[1] Duke Univ, Durham, NC USA
[2] Duke Univ, Dept Orthopaed Surg, 200 Trent Dr, Durham, NC 27710 USA
[3] Duke Univ, Dept Orthopaed Surg, Durham, NC USA
[4] Northeast Ohio Med Univ, Coll Med, Rootstown, OH USA
[5] Univ Michigan, Dept Orthopaed Surg, Ann Arbor, MI USA
[6] Thomas Jefferson Univ Hosp, Rothman Orthopaed Inst, Philadelphia, PA USA