[1] Univ Calif San Francisco, Dept Anesthesia, San Francisco, CA 94110 USA
[2] Univ Calif San Francisco, Dept Perioperat Care, San Francisco, CA USA
[3] Univ Calif San Francisco, Cerebrovasc Res Ctr, San Francisco, CA USA
[4] Univ Calif San Francisco, Inst Cardiovasc Res, San Francisco, CA 94143 USA
[5] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA
[6] Univ Calif San Francisco, Dept Neurol, San Francisco, CA 94143 USA
[7] Univ Calif San Francisco, Dept Med, San Francisco, CA USA
[8] Univ Calif San Francisco, Dept Neurol Surg, San Francisco, CA 94143 USA
[9] Kaiser Permanente, Med Care Program, Div Res, Oakland, CA USA
[10] Duke Univ, Med Ctr, Dept Genet, Durham, NC USA