title: Are elderly volunteers normal?
authors: P J
authors: PJ
authors: Drinka
authors: T J
authors: TJ
authors: Drinka
mesh_terms: D000367:Age Factors; D000368:Aged / Q000523:psychology*; D000553:Ambulatory Care; D003866:Depressive Disorder / Q000523:psychology / Q000628:therapy; D006760:Hospitalization; D006801:Humans; D008297:Male; D010551:Personality; D012107:Research Design / Q000592:standards*