[1] Univ Calif San Francisco, Sch Med, San Francisco, CA USA
[2] Natl Inst Aging, Intramural Res Program, Lab Behav Neurosci, Baltimore, MD USA
[3] Natl Inst Aging, Intramural Res Program, Clin Res Unit, Baltimore, MD USA
[4] Univ Calif San Francisco, Dept Dermatol, San Francisco, CA 94115 USA
[5] Vet Affairs Hlth Care Syst, Dermatol Serv, San Francisco, CA USA
[6] Univ Calif San Francisco, Dept Psychiat & Behav Sci, San Francisco, CA USA
[7] Univ Calif San Francisco, Dept Neurol, San Francisco, CA USA
[8] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA USA