title: Response to Cosco and Kuh.
authors.affiliation: University of Rochester, Rochester, New York.
authors.forename: Susan M
authors.initials: SM
authors.lastname: Friedman
authors.affiliation: University of Rochester, Rochester, New York.
authors.forename: Krupa
authors.initials: K
authors.lastname: Shah
authors.affiliation: University of Rochester, Rochester, New York.
authors.forename: William J
authors.initials: WJ
authors.lastname: Hall
mesh_terms: D000375:Aging / Q000502:physiology*; D016330:Frail Elderly; D005853:Geriatrics; D006293:Health Promotion; D006801:Humans