[1] Harvard Univ, Brigham & Womens Hosp, Sch Med, Dept Orthopaed Surg, Boston, MA 02115 USA
[2] Univ Michigan, Dept Orthopaed Surg, Ann Arbor, MI 48104 USA
[3] Univ Michigan, Ctr Healthcare Outcome & Policy, Ann Arbor, MI 48109 USA
[4] Univ Michigan, Div Gen Med, Dept Internal Med, Robert Wood Johnson Clin Scholars Program, Ann Arbor, MI 48109 USA