Family caregiving to the frail elderly.
D000368:Aged / Q000523:psychology; D003710:Demography; D005006:Ethnicity; D005190:Family; D005260:Female; D006302:Health Services Research; D006304:Health Status; D006701:Home Nursing; D006801:Humans; D008297:Male; D008393:Marriage; D012919:Social Behavior; D012944:Social Support; D012959:Socioeconomic Factors; D014481:United States