[1] VA Greater Los Angeles Healthcare Syst, Geriatr Res Educ & Clin Ctr, Los Angeles, CA USA
[2] Univ Calif Los Angeles, David Geffen Sch Med, Los Angeles, CA 90095 USA
[3] Univ Washington, Sch Nursing, Dept Psychosocial & Community Hlth, Seattle, WA 98195 USA
[4] Univ Calif Los Angeles, Semel Inst Neurosci & Human Behav, Cousins Ctr Psychoneuroimmunol, Los Angeles, CA 90024 USA