Aging population research: suggestions for a model data system for service planning.
D000367:Age Factors; D000368:Aged; D003625:Data Collection / Q000379:methods*; D006285:Health Planning / Q000639:trends*; D006801:Humans; D008962:Models, Theoretical; D011157:Population Dynamics; D012106:Research; D014171:Transients and Migrants; D014481:United States