[1] Univ Washington, Grp Hlth Res Inst, Seattle, WA 98195 USA
[2] Univ Washington, Dept Med, Seattle, WA 98195 USA
[3] Univ Washington, Dept Hlth Serv, Seattle, WA 98195 USA
[4] Univ Calif San Francisco, Dept Psychiat, San Francisco, CA USA
[5] Univ Calif San Francisco, Dept Neurol, San Francisco, CA USA
[6] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA
[7] San Francisco Vet Affairs VA Med Ctr, San Francisco, CA USA
[8] Univ Michigan, Div Gen Med, VA Ann Arbor Ctr Clin Management Res, Ann Arbor, MI 48109 USA
[9] Univ Michigan, Inst Social Res, Ann Arbor, MI USA
[10] Univ Michigan, Inst Gerontol, Ann Arbor, MI 48109 USA
[11] Univ Michigan, Inst Healthcare Policy & Innovat, Ann Arbor, MI USA