[1] Univ Michigan, Dept Phys Med & Rehabil, Ann Arbor, MI USA
[2] Univ Michigan, Dept Internal Med, Div Rheumatol, Ann Arbor, MI USA
[3] Univ Michigan, Dept Family Med, Ann Arbor, MI USA
[4] Univ Michigan, Dept Anesthesiol, Ann Arbor, MI USA
[5] Univ Michigan, Sch Publ Hlth, Dept Hlth Management & Policy, Ann Arbor, MI USA
[6] Univ Michigan, Dept Internal Med, Div Geriatr Med, Ann Arbor, MI USA
[7] VA Ann Arbor Healthcare Syst, Geriatr Res Educ Clin Ctr, Ann Arbor, MI USA
[8] VA Ann Arbor Healthcare Syst, Ctr Clin Management Res, Ann Arbor, MI USA
[9] VA Ann Arbor Healthcare Syst, Dept Ambulatory Care, Ann Arbor, MI USA
[10] Univ Michigan, Dept Internal Med, Div Gen Med, Ann Arbor, MI USA
[11] Univ Calif Irvine, Susan Samueli Integrat Hlth Inst, Sch Med, Irvine, CA USA
[12] Univ Michigan, Sch Publ Hlth, Dept Nutr Sci, Ann Arbor, MI USA
[13] VA Ann Arbor Ctr Clin Management Res, NCRC, 2800 Plymouth Rd,Bldg 16,333W, Ann Arbor, MI 48109 USA