title: Research and the frail elderly: ethical and methodological issues in controlled social experiments.
mesh_terms: D000368:Aged; D035841:Behavioral Research; D026686:Beneficence; D002140:California; D035061:Control Groups; D004992:Ethics, Medical; D006301:Health Services Needs and Demand; D006299:Health Services for the Aged; D006805:Human Experimentation; D006801:Humans; D007258:Informed Consent; D012107:Research Design