[1] Rush Univ, Dept Orthopaed Surg, Med Ctr, Adult Reconstruct Div, Chicago, IL 60612 USA
[2] Brigham & Womens Hosp, Dept Orthopaed Surg, 75 Francis St, Boston, MA 02115 USA
[3] Harvard Med Sch, Boston, MA 02115 USA
[4] Univ Rochester, Sch Med, Dept Orthopaed Surg, Ctr Musculoskeletal Res, Rochester, NY USA
[5] Hosp Special Surg, Adult Reconstruct & Joint Replacement Div, Dept Orthopaed Surg, 535 E 70th St, New York, NY 10021 USA