[1] Indiana Univ, Geriatr Program, Indianapolis, IN 46204 USA
[2] Indiana Univ, Ctr Aging Res, Regenstrief Inst Inc, Indianapolis, IN 46204 USA
[3] Univ Calif Los Angeles, David Geffen Sch Med, Div Geriatr, Los Angeles, CA 90095 USA
[4] VA Greater Los Angeles Hlth Syst, Los Angeles, CA USA