Epidemiological studies in the elderly: methodological considerations.
D000368:Aged; D001794:Blood Pressure; D003430:Cross-Sectional Studies; D004032:Diet; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D009026:Mortality; D009749:Nutrition Surveys; D011379:Prognosis; D011897:Random Allocation