[1] Univ Miami, Dept Publ Hlth Sci, Div Epidemiol & Populat Hlth, Miami, FL 33136 USA
[2] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA
[3] Univ Calif San Francisco, Dept Neurol, San Francisco, CA USA
[4] Univ Calif San Francisco, Dept Psychiat, San Francisco, CA USA
[5] San Francisco VA Med Ctr, San Francisco, CA USA