title: Recruitment and retention issues in clinical trials.
authors: Johns Hopkins Medical Institutions, Baltimore, MD 21231, USA.
authors: Barbara J
authors: BJ
authors: deLateur
authors: Wendy S
authors: WS
authors: Shore
mesh_terms: D000465:Algorithms; D002986:Clinical Trials as Topic / Q000379:methods*; D004185:Disability Evaluation; D005260:Female; D006801:Humans; D009103:Multiple Sclerosis / Q000534:rehabilitation*; D018579:Patient Selection; D026741:Physical Therapy Modalities; D016896:Treatment Outcome