[1] Univ Calif San Francisco, Div Gen Internal Med, San Francisco, CA 94143 USA
[2] Univ Calif San Francisco, Div Clin Informat, San Francisco, CA 94143 USA
[3] Stanford Univ, Sch Med, Ctr, Stanford, CA 94305 USA
[4] Mayo Clin Rochester, Dept Med & Quantitat Hlth Sci, Rochester, MN 55905 USA
[5] Univ Colorado, Sch Med, Dept Med, Aurora, CO 80309 USA
[6] Stanford Univ, Sch Med, Dept Psychiat, Stanford, CA 94305 USA
[7] Amer Med Assoc, Chicago, IL 60654 USA
[8] Stanford Univ, Dept Med, Sch Med, Stanford, CA 94305 USA
[9] Stanford Med, Stanford, CA 94305 USA