[1] Univ Michigan, Sch Med, Dept Internal Med, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Vet Affairs Ctr Clin Management Res, Ann Arbor, MI 48109 USA
[3] Univ Michigan, Inst Healthcare Policy & Innovat, Ann Arbor, MI 48109 USA
[4] Univ Michigan, Dept Neurol, Ann Arbor, MI 48109 USA
[5] Univ Michigan, Stroke Program, Ann Arbor, MI 48109 USA