[1] Univ Michigan, Dept Internal Med, Ann Arbor, MI 48109 USA
[2] VA Ann Arbor Healthcare Syst, Ann Arbor, MI USA
[3] Vet Affairs Ctr Clin Management Res, Ann Arbor, MI USA
[4] Univ Michigan, Inst Healthcare Policy & Innovat, Ann Arbor, MI 48109 USA
[5] Univ Texas Hlth San Antonio, Dept Internal Med, San Antonio, TX USA
[6] South Texas Vet Healthcare Syst, San Antonio, TX USA