For neither MI nor LMI parents did having to arrange their own ap

For neither MI nor LMI parents did having to arrange their own appointment time particularly facilitate or hinder taking their child for MMR (as indicated by a mean score close to 0). However,

for all parents, if they could get hold of the single antigen vaccines then they would be less likely to attend for MMR (as indicated by a negative mean score). Parents were also somewhat hindered by: having to take an older child for vaccinations (compared to a young infant); information in the media; being worried about taking their child. Conversely, deciding to tell the child that they were going for vaccinations was more likely to facilitate attendance. For dTaP/IPV, consistent Venetoclax manufacturer with the finding that perceived control did not predict intention, none of the 14 beliefs differed significantly between LMI parents and MI parents at p ≤ 0.002.

For all parents: having enough information; having pre-arranged appointments; having free time; being sent reminders; having support from healthcare professionals; having a child who was 100% fit and well; being immunised as a child; deciding to tell the child that they are going for vaccinations, tended to facilitate attendance (indicated by a positive mean score on the item). However, having to arrange their Talazoparib in vivo own appointment time (LMI parents only); having to take an older child for vaccinations (compared to a young infant); availability of the single antigen vaccines; information in the media (LMI parents only); being worried about taking their child for dTaP/IPV, tended to hinder attendance (indicated by a negative mean score on the item). Parental fear of ‘needles’ was not a barrier to immunisation in either group. This is the first study to use a questionnaire, based on qualitative interviews with parents [3] and [4] and the TPB [10] and [11], to predict and compare parents’ the intentions to take preschoolers for either a second MMR or dTaP/IPV. The prediction that there would be differences between the two vaccinations, both in the strength of the beliefs measured and in the extent to which they predicted parents’

intentions, was only partially supported. Generally, parents had positive attitudes towards immunising, moderating strong subjective norms and high perceived behavioural control. Nonetheless, regression analyses revealed that intention to immunise with either MMR or dTaP/IPV was underpinned by different factors. For MMR, intention was predicted by attitude and perceived control: parents with more positive attitudes and greater perceptions of control had stronger intentions to immunise. For dTaP/IPV, attitude and ‘number of children in the family’ predicted intention: parents with more positive attitudes and more children had greater intentions to immunise. Thus, although these findings provide some support for the predictive value of the TPB, there was a direct, unmediated effect of number of children on intention to immunise with dTaP/IPV. The TPB would predict no such effect.

Protocol and exercise intensity are relevant to induced changes i

Protocol and exercise intensity are relevant to induced changes in muscle function, which physiotherapists should take into account. Patients intolerant of progression Selleck Ibrutinib of current intensity should be considered for supervised sessions. “
“Summary of: Globas C et al (2012) Chronic stroke survivors benefit from high-intensity aerobic treadmill exercise: a randomized controlled trial. Neurorehabil Neural Repair 26: 85–95. [Prepared by Marco YC Pang, CAP Editor.] Question: Does high-intensity aerobic treadmill exercise improve cardiovascular fitness and gait function in people with chronic stroke? Design: Randomised, controlled trial. Setting:

An outpatient rehabilitation centre in Germany. Participants: Individuals with chronic stroke > 60 years of age with residual gait impairment, and ability to walk on the treadmill at ≥ 0.3 km/h for 3 minutes were eligible. Serious cardiovascular conditions (eg, angina pectoris, heart

failure, valvular dysfunction, peripheral arterial occlusive disease), dementia, aphasia, and major depression were exclusion criteria. Randomisation of 38 participants allocated 20 to the intervention group and 18 to the usual care group. Interventions: The intervention group underwent treadmill training (3 times/week) for 3 months. The program was intended to achieve Quisinostat chemical structure 30–50 minutes of treadmill training at 60–80% of the maximum heart rate reserve as determined by a maximum effort exercise test. The training was supervised by a physician and/or physiotherapist. The usual care group received conventional care physiotherapy for 1 hour 1–3 times a week without any aerobic training. Outcome measures: The primary outcomes were peak oxygen consumption rate and the 6-minute walk test. Secondary outcome measures were self-selected and maximum walking speeds as measured in the 10-m walk test, Berg balance score, 5-Chair-Rise test, Rivermead Mobility Index, and Medical Outcomes Study Short-Form 12 (SF- 12). The outcomes were measured at baseline, immediately after completion of training, and at 12 months. Results: 36 participants completed the study. After the 3-month training period, the change in peak oxygen consumption rate was significantly

see more more in the treatment group, by 6.3 mL/kg/min (95% CI 5.7 to 6.9). The change in distance achieved in the 6-minute walk test was also significantly more in the treatment group by 53 metres (95% CI 32 to 75). Among the secondary outcomes, maximum walking speed (by 0.14 m/s, 95% CI 0.08 to 0.20), Berg balance score (by 2.6 points, 95% CI 0.5 to 4.7), and SF-12 Mental score (by 4.0 points, 95% CI 3.4 to 4.6) improved significantly more in the treadmill training group than the usual care group after the treatment period. The groups did not differ significantly on the remaining secondary outcomes. It was reported that compared to baseline peak oxygen consumption rate and 6-minute walk test distance were significantly improved at 12 months.

The excellent safety of the vaccine-adjuvant combinations demonst

The excellent safety of the vaccine-adjuvant combinations demonstrated in this trial will facilitate follow-on studies to optimize dmLT-vaccine formulations. MEV also induced systemic IgA and IgG responses to LTB in serum in almost all vaccinated volunteers, with the highest response rate (97%) in the group receiving vaccine plus 10 μg dmLT. Indeed, the combination of MEV with 10 μg dmLT gave rise to comparable anti-LTB responses, both in IgA and IgG, as induced by a fourfold higher dose of LCTBA in a previous study [11]. Interestingly, the anti-LTB responses determined

by ELISA were closely mirrored by increases in LT neutralizing titers, supporting that anti-LTB responses reflect functional LT immunity. dmLT may also be capable of enhancing systemic anti-toxin immune responses, as suggested by

INK 128 nmr the finding (see Supplementary material) that MEV plus 10 μg dmLT induced significantly higher LT neutralizing Selleck DAPT as well as anti-LT IgA and IgG antibody responses in serum than the first-generation ETEC vaccine containing a comparable dose of CTB. As in previous studies of oral, inactivated as well as live ETEC vaccines in Swedish and American volunteers [5] and [24], IgA antibody responses against all of the different CFs in serum were infrequent and low. Serum IgA antibody responses induced by MEV against O78 LPS were, however, frequent. Fecal and ALS IgA responses against O78 LPS were also observed in a majority of vaccinees. Although O78 LPS is only expressed by about 10% of clinical ETEC isolates [25], these responses may add to the protective coverage of the vaccine since we have previously shown that anti-O antibodies may provide protection against ETEC expressing the homologous serogroup [5]. A combination of LT and CF antigens seems to be required for

broad protective coverage. It has been estimated that a vaccine containing LT antigen and the most prevalent CF antigens, as those in MEV and in an oral, live ETEC candidate vaccine, ACE527, recently evaluated in humans [26], may have the Urease potential to protect against at least 80% of all ETEC strains causing disease in humans [1] and [5]. In contrast, a vaccine based on LT antigen alone will not offer protection against ST-only ETEC strains and is likely to provide shorter duration of protective immunity [27]. Based on the excellent safety profile and capacity of MEV to induce highly significant mucosal immune responses against the most prevalent ETEC virulence factors, studies are planned to evaluate the safety and immunogenicity of the vaccine alone and in combination with different dosages of dmLT in descending-age groups in Phase I/II trials in Bangladesh and for protective efficacy in visitors to ETEC-endemic areas. AMS and AL were the principal investigators. AMS, AL, JH, LB, RW, JC, NC and BG participated in the design of the studies and interpretation of results.

A characteristic peak of the carbonyl group was observed at 1650

A characteristic peak of the carbonyl group was observed at 1650.44 cm−1 which showed the presence of cytidine nucleus. A band of peaks at 3326.95 and 3203.12 cm−1 demonstrated the presence of amino and hydroxyl groups respectively. Another peaks were obtained at 1284.02 and 1159.25 cm−1 owing to asymmetrical

and symmetrical stretching of the C–O–C system present in the oxathiolane ring which confirmed the stable nature of LAMI in the formulations. Similarly, the FT-IR spectra of the accelerated stability samples at 40 ± 2 °C and 75 ± 5% RH were acquired after 1 and 3 months. The peaks were observed in the carbonyl group at 1650.99 and 1651.35 cm−1 for 1 and 3 month samples respectively. Band peaks obtained at 1285.33 and 1158.89 cm−1 for 1 this website month sample and 1285.58 and 1158.58 for 3 month sample owing to asymmetrical and symmetrical stretching of the C–O–C system present in the oxathiolane ring. The obtained peaks at 3208.26 and 3213.43 cm−1 were in conformity with the hydroxyl group for 1 and 3 month samples respectively. Further the peaks at 3328.03 and 3330.77 cm−1 were shown for the presence of amine group in 1 and 3 month samples respectively. Selleck INK1197 The results indicated that LAMI was stable in the initial and stability samples of formulations and the absence of drug-excipient interactions in the samples. Fig. 3 shows the FT-IR spectra of

pure LAMI and matrix tablets at the initial time and after stability studies. Differential scanning calorimetry (DSC) study of matrix tablets was performed to determine the drug excipient compatibility study and the results are shown in Fig. 4. The thermograms of pure LAMI and formulations showed a sharp endothermic peak at 180 °C which indicated that the drug existed in

its crystalline form and there was no drug to polymer interaction in the fresh samples (Fig. 4A and B). Similarly thermograms of accelerated stability (40 ± 2 °C and 75 ± 5% RH) samples after 3 months showed the same endothermic peaks at 180 °C which further confirmed the absence of polymorphism and drug-excipient interactions in the prepared matrix tablets (Fig. 4C). The plasma samples of LAMI were analysed as described in the method. Fig. 5 shows the sample chromatogram of LAMI Thalidomide extracted from the plasma. The plasma kinetic data were assessed with Win-nonlin software. Fig. 6 shows the plots of the mean plasma concentration of the LAMI in both the test XR formulation (T) and reference conventional formulation (R). The mean plasma concentration of test formulation F-3 (T) was slowly increased after oral administration in all the subjects. The Cmax of 1361 ng/ml was gradually reached in 4 h. In case of conventional reference formulation (R), LAMI was rapidly absorbed and the Cmax of 1667 ng/ml was reached after 1.6 h (tmax). The Cmax of the T was significantly less than that of the R.

Ces critères ont une certaine pertinence : pour certains auteurs

Ces critères ont une certaine pertinence : pour certains auteurs [66] and [67], la réduction des risques est une option thérapeutique envisageable et laisser les patients choisir leurs objectifs thérapeutiques augmente les chances www.selleckchem.com/HIF.html de succès [68]. Différentes échelles d’évaluation étaient utilisées (OCDS, DrInC, Craving Severity Scale [CSS], European Addiction Severity Index [EuropASI]), ne permettant pas les comparaisons entre les

études. Dans les marqueurs d’évaluation biologique, le recours au CDT n’était pas systématique. Certains essais utilisaient un design particulier, par exemple, un essai ouvert comparant le topiramate à la naltrexone a inclus indifféremment des patients sevrés ou non [24], un autre essai ouvert comparant le topiramate au disulfirame [25] exigeait l’implication des familles dans la prise en charge. Dans la dépendance tabagique, il n’existe qu’un essai monocentrique randomisé

contrôlé versus placebo de faible puissance [26]. Les autres résultats sont issus de l’analyse de sous-groupe au sein d’essais concernant l’alcoolodépendance [27] and [28]. Dans la dépendance à la cocaïne, un essai [29] ne retient que des sujets avec un score de sevrage (Cocaine Selective Severity Assessment) inférieur à vingt-deux et ne rapporte pas de résultats significatifs mais un rapport de cote (Odds Ratio) de consommer de la cocaïne. Un autre essai [12] retrouve une proportion d’abstinents plus importante dans le groupe topiramate et sels d’amphétamines mais la significativité de ce résultat n’est pas rapportée. Rapamycin nmr Un troisième essai a retrouvé un résultat significatif sur un critère de jugement composite (consommation rapportée, test urinaire et taux de concordance estimé entre les deux) mais les résultats restent non significatifs concernant la proportion de semaines sans test urinaire positif [13]. Dans le gambling, il n’existe qu’un essai monocentrique randomisé contrôlé versus placebo de faible puissance [36]. Actuellement, la prescription du topiramate dans les troubles addictifs est une indication non reconnue dans la plupart des pays francophones,

notamment en France, en Belgique et au Canada. Le patient doit en être informé et le recueil de son consentement GBA3 est nécessaire. La balance bénéfice/risque doit être évaluée, et la prescription doit pouvoir être scientifiquement justifiée. Le risque de survenue de glaucome lors de la prescription de topiramate et les complications potentiellement graves de cette pathologie ophtalmologique (cécité notamment) incitent à la prudence. Enfin, les effets indésirables du topiramate sont indépendants des substances consommées et il peut être introduit chez des patients qui ne sont pas encore abstinents, quelle que soit l’addiction. Il n’y a pas eu d’interactions décrites avec l’alcool ou les drogues consommés par les patients inclus dans les études.

05), whereas the difference in AUC0−30 of the two formulations wa

05), whereas the difference in AUC0−30 of the two formulations was found to be significant (P < 0.05). The AUC0−30 values were 130.9 ± 4.9 μg h/ml and 135.8 ± 2.5 μg h/ml

for F10 and Hifenac SR respectively and the difference between AUC0−30 values of F10 (130.9 ± 4.9) and Hifenac SR (135.8 ± 2.5) was 3.74%. The percentage deviation observed for formulation (F10) and marketed product (Hifenac SR) tablets was within the range of 80–125% with respect to Cmax, Tmax and AUC values, which is a general regulatory requirement for tablets to be bioequivalent. Park et al10 evaluated the effects of PEG or PEO on matrix properties of tablets. Based on their optimization model for drug release, they reported that the optimal settings in matrix tablets were 124.3 mg and 110 mg

for PEG and PEO respectively. Petrovi et al11 developed artificial intelligence methods for the optimization SRT1720 solubility dmso of drug release from matrix tablets, using diclofenac selleck compound sodium and caffeine as model drugs and polyethylene oxide and glyceryl palmitostearate as matrix forming materials, for hydrophilic and lipid matrix tablets respectively. Petrovi et al12 have also studied the use of dynamic neural networks to predict the release of diclofenac sodium from PEO matrix tablets. They reported that dynamic neural networks are superior to static networks. Mohsen et al13 developed and evaluated sustained release matrix tablets of aceclofenac with Eudragit® RSPO and Eudragit® RLPO. These tablets released aceclofenac up to 24 h in vitro and exhibited longer MRT when compared to commercial product of aceclofenac (Bristaflam®), when studied in albino rabbits. Yadav et al 14 carried out the formulation, evaluation check and optimization of aceclofenac sustained release matrix tablets using hydrophilic and hydrophobic polymers. Gandhiji and Ramesh 15 developed hydroxy propyl

methyl cellulose polymer based sustained release tablets of aceclofenac and found that they released drug over a period of 24 h. The results of the present work are in agreement with these reports, in that polymers, specifically PEOs, may be used for prolonging the drug release from matrix tablets. The present work, further, establishes, in human volunteers, that the drug is available in blood over a period of 24 h. The results of the present study clearly demonstrated the successful preparation of once daily, sustained release matrix tablets of aceclofenac, employing polyethylene oxides of different molecular weights, as controlled release polymers. The formulation F10, comparable to a marketed SR formulation, Hifenac SR, was developed and found to be giving effective and safe plasma concentration time profile up to 24 h. All authors have none to declare. “
“Staphylococcus aureus (S. aureus) resistant to methicillin is a major problem that the world is now facing.

The participants had centralisation, which is a feature of reduci

The participants had centralisation, which is a feature of reducible Derangement Syndrome. In the study, MDT was compared to a rehabilitation program including infrared irradiation, massage and exercises for the neck and shoulder. The outcome measures included pain intensity at the head, neck, shoulders, upper extremities, and overall. Pain intensity on a scale of 0 to 100 favoured MDT, with mean differences (95% CI) of 28 (17 to 39) at the head, 29 (20 to 38) at the

neck, 31 (21 to 41) at the shoulders, 40 (31 to 48) at the upper extremities, and 40 (32 to 48) overall. Except at the head, these confidence intervals had lower limits that were higher MK-8776 supplier than 20 on a scale of 0 to 100. A recent systematic review40 concluded that centralisation

was generally a good prognostic factor and a treatment-effect modifier. The present review included studies of any participants with neck pain, not specific subgroups such as those with centralisation. The estimate of the effect of MDT may therefore have been influenced by the inclusion of less-responsive subgroups such as irreducible Derangement Syndrome, Dysfunction Syndrome, Posture Syndrome and Other. Among people with neck pain, the prevalence of irreducible Derangement Syndrome, Dysfunction Syndrome, Posture learn more Syndrome and Other is 0.9%, 8.1%, 2.7% and 7.2%, respectively.41 In particular, it may be difficult for non-Diploma MDT therapists to guide patients in the irreducible Derangement Syndrome and Other subgroups appropriately because the treatment for these subgroups requires a biopsychosocial approach, which is introduced in the Diploma MDT education program, rather than a simple-mechanical approach, which is introduced in the general MDT

workshops. This present review accepted all measures of disability. The Neck Disability Index42 was used by two trials: the Northwick Park Neck Pain Questionnaire43 by one trial, and the 15-item Copenhagen Neck Functional Disability Scale44 by the other trial. These questionnaires are spine-specific questionnaires and therefore may not accurately reflect the most troublesome construct for each patient. The Neck Disability Index and those the Copenhagen Neck Functional Disability Scale have lower responsiveness than the Patient Specific Functional Scale45 in people with chronic whiplash-associated disorders.46 The Neck Disability Index was also inferior to the Patient Specific Functional Scale in people with cervical radiculopathy in terms of test-retest reliability, construct validity, and responsiveness.47 Therefore, it may be appropriate for future research to include a patient-centered questionnaire for the assessment of disability and functional performance, as well as a spine-specific disability measure.

4 Visual impairment has been found to be an independent risk fact

4 Visual impairment has been found to be an independent risk factor for falls, particularly with relation to impaired edge-contrast sensitivity and depth perception.5 and 6 People with visual impairment FK228 are at a particularly high risk of falls due to impaired balance7 and difficulty detecting environmental hazards. With normal ageing, conduction speed and central nervous system processing slows down,8 forcing balance control mechanisms to rely more heavily on visual input to maintain stability,9 particularly during single limb balance.10 This has obvious implications for older adults with visual impairments. Deterioration

in balance control in older people is primarily in the medio-lateral direction11 and reduced visual input has been shown to have a greater impact on lateral balance control,12 which amplifies the deterioration

in the older population with visual impairments on mobility tasks involving single-limb balance. Travel in the community presents additional hazards for older people with visual impairment. Environmental preview involves scanning the environment ahead with sufficient time to recognise potential hazards and avoid them. Glare can interfere with environmental preview in people with visual impairment. High levels of glare sensitivity are reported in individuals with glaucoma13 and recovery from glare exposure is slower in people with age-related macular degeneration.14 Fluctuations in environmental light can click here divide attention and reduce the available reaction time to hazards for this population. When attention is divided, older adults have Carnitine dehydrogenase a decreased ability to avoid obstacles in the environment, compared to younger adults.15 Individuals with visual impairments may also rely on memorised aspects of the environment and

often employ a mobility aid as they travel. If the individual is using a long cane as a mobility aid, the cane is detecting the next footfall, giving little warning before a hazard is encountered. Attention allocated to route memory and mobility-aid use, in addition to postural stability and hazard avoidance, could thus overload attention resources and further increase the risk of falls in people with visual impairment. A Cochrane review by Gillespie et al16 identified several effective approaches to fall prevention for the general population of older adults living in the community, including exercise, home safety, medication management and interventions targeting multiple risk factors. The latest update of that review included no new trials that provided physical training for community-dwelling older adults with untreatable visual impairments. A Cochrane review by Cameron et al17 identified that Vitamin D prescription reduces falls in residential care facilities and that interventions targeting multiple risk factors may also do so, but it included no trials that provided physical training for older adults with visual impairments in care facilities and hospitals.

, 2005 and Rice et al , 2008; Ivy et al , 2010 and Wang et al , 2

, 2005 and Rice et al., 2008; Ivy et al., 2010 and Wang et al., 2011). The ability to manipulate early-life

experience in both adverse and salubrious directions provides powerful frameworks for examining the mechanisms for the resulting vulnerability and resilience. A significant body of work has established a molecular signature of the resilience or vulnerability phenotypes generated by early-life experience in rodents. In adult rats experiencing augmented maternal care, an enduring upregulation of glucocorticoid receptor (GR) expression in hippocampus, and a repression of corticotropin releasing hormone (CRH) expression in hypothalamic paraventricular (PVN) neurons was reported (Plotsky and Meaney, 1993 and Avishai-Eliner et al., 2001a). The epigenetic basis of the enduring enhancement of hippocampal GR expression selleck inhibitor was uncovered by pioneering studies by the Meaney group (Weaver et al., 2004). Examination of the temporal PLX4032 concentration evolution of the molecular signature of rats experiencing

augmented maternal care revealed that repression of CRH expression in hypothalamus preceded the increased GR expression in hippocampus, and was directly dependent on recurrent predictable barrages of maternal care (Avishai-Eliner et al., 2001a and Fenoglio et al., 2006). These data suggested that the CRH neuron in the hypothalamus may be an early locus of maternal care-induced brain programming. Notably, it is unlikely that changes in CRH or GR expression in themselves explain the remarkable resilient phenotype of rats experiencing augmented aminophylline maternal care early in life. Whereas the GR and CRH are likely important mediators of long-lasting effects of maternal care, they may also serve as marker genes, a tool to study mechanisms of broad, enduring gene expression changes. In addition, determining the locations of the changes in gene and protein expression helps to identify specific ‘target neurons’ that are re-programmed to enable the structural and functional plasticity that underlies resilience. As mentioned above, the repression of

gene expression in CRH neurons occurred early and was already present after a week of ‘handling’, i.e., on postnatal day 9 in the pups (Avishai-Eliner et al., 2001a, Fenoglio et al., 2006 and Korosi et al., 2010). In addition, the CRH-expressing neurons in the hypothalamus were identified as a component of a neuronal network activated by maternal care (Fenoglio et al., 2006). The latter finding emerged from Fos-labeling and mapping studies that queried which neurons were activated at several time points after returning of pups to their mothers following brief (15 min) separations. The Fos mapping studies demonstrated that the maternal signal traveled via the central nucleus of the amygdala (ACe) and bed nucleus of the stria terminalis (BnST) to the hypothalamic PVN (Fenoglio et al., 2006).

marginale [3] and [43]

marginale [3] and [43]. selleck kinase inhibitor Two investigations are particularly noteworthy in this regard: firstly, the identification of the surface proteome of A. marginale [15] and [17] and secondly, the identification of type 4 secretion system components recognized by T and B cells from protected cattle [19]. However, while sterile immunity against homologous challenge has been achieved, these provide only partial immunity against heterologous challenge. This may be due to the immunodominant responses induced against the hypervariable MSP2 and MSP3 proteins.

Compared to these, other antigens, such as the T4SS proteins and other surface proteome molecules, are considered subdominant antigens. These induce weaker and more inconsistent antibody and see more T cell responses, at least in the context of complex immunogens such as whole organism and membrane vaccines that also contain MSP2 and MSP3

[19]. However, while these responses may be less robust, these antigens appear to be less variable, making them important to include in a vaccine producing pan-strain immunity. The body of previous research in A. marginale has resulted in a large catalog of potential vaccine candidates. We attempted here to reduce the number of candidate antigens by applying high throughput genome sequencing and bioinformatics analysis to 10 U.S. strains of A. marginale. The intent was to identify the most conserved proteins from all of the above vaccine strategies that may form the core components of a broadly protective vaccine. We initially verified that pyrosequencing was capable of accurately determining the relationships among already fully sequenced strains and the variable msp2 and msp3 pseudogenes in those strains. We correctly identified the shared msp2 and msp3 pseudogenes and those having <90% identity. This method was then applied to all 10 U.S. strains of A. marginale. Extensive diversity was observed in the

repertoire of both msp2 and msp3 pseudogenes among strains, with generally more diversity observed in the complement of msp3 pseudogenes when compared to msp2. There was also extensive diversity in SNPs among strains, distributed over most Casein kinase 1 of the genome, agreeing with previous observations on a smaller subset of strains [27]. However, the members of the pfam01617 family are relatively well conserved overall, with no protein having <90% identity between all the strains examined. All of these proteins have SNPs, and SNPs within strains have a similar distribution pattern to those described for the rest of the genome in terms of the numbers of strains with polymorphisms. A surprising observation was the more extensive diversity in A. marginale subspecies centrale when compared to all 10 U.S. A. marginale strains.