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机译:The Burden of Functional Disabilities for Middle-Aged and Older Adults in the United States
North Dakota State Univ, Dept Hlth Nutr & Exercise Sci, Fargo, ND USA;
Univ Texas Med Branch, Div Rehabil Sci, Galveston, TX 77555 USA;
Univ Texas Med Branch, Dept Prevent Med & Community Hlth, Galveston, TX 77555 USAWashington Univ, Brown Sch Social Work, St Louis, MO USAUniv Michigan, Dept Phys Med & Rehabil, Ann Arbor, MI 48109 USA;