[1] Jordan Univ Sci & Technol, King Abdullah Univ Hosp, Dept Special Surg, Div Orthopaed Surg, Irbid Amman St,POB 3030, Irbid 22110, Jordan
[2] Univ Massachusetts, Sch Med, Worcester, MA USA
[3] Brigham & Womens Hosp, Dept Orthopaed Surg, 75 Francis St, Boston, MA 02115 USA
[4] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Orthopaed Surg, Boston, MA USA