Recruitment and retention of population-representative samples should be a priority for neuroscience research.
10 Ensuring participation and retention of these populations in longitudinal studies is a concern.
Recruitment and retention of these populations in research trials, and retention in weight loss trials has been an ongoing challenge.
Other studies in experienced trial sites (USA, Caribbean, Southern Africa and in Latin America) have already shown how financial compensations and retention measures help with retention of marginalized populations.
Similarly, using interviewers of the same ethnic backgrounds as their subjects [ 3] and employing project staff who pay attention to cultural sensitivity [ 37- 39] enhance recruitment and retention of minority populations.
Similar findings for lower entry and retention of these populations are reported in other European studies [ 13, 16, 17], and lower ART uptake or viral suppression among migrants was observed in Spain [ 18], UK [ 19] and France [ 20].
Recruitment and retention of a representative population, and compliance and the collection of accurate data are the four cornerstones of longitudinal studies.
Challenges include recruitment and retention of the target population (which is vulnerable and facing the acute stress of a cancer diagnosis), and the longitudinal nature of the design potentially increases the likelihood of attrition.
Retention of an effective population of CD4 T helper cells appears to be a prerequisite for ongoing viral control, as shown by the reoccurrence of viraemia in individuals where CD4 responses wane, even after several months of apparent control [19,21,52].
Our study provides a rationale for targeting CCR7 in IPF and for the further investigation of therapies to favor the expansion and retention of the Treg population in the IPF lung.
Given that recruitment and retention of our study population would have been quite difficult without involvement from community members, it is clear that community-based participatory research is essential for detailed evaluations of asthma in public housing.
