[1] Univ Calif Los Angeles, Sch Publ Hlth, Dept Community Hlth Sci, Los Angeles, CA 90095 USA
[2] Rutgers State Univ, Inst Hlth Hlth Care Policy & Aging Res, New Brunswick, NJ 08903 USA
[3] Univ Calif Los Angeles, David Geffen Sch Med, Div Geriatr, Los Angeles, CA 90095 USA