作者单位:Emory Univ, Dept Orthoped Surg, 59 Executive Pk S,Suite 1000, Atlanta, GA 30322 USA[1]Univ Manitoba, Pan Am Clin, Winnipeg, MB, Canada[2]Massachusetts Gen Hosp, Boston Shoulder Inst, Boston, MA 02114 USA[3]King Edward Mem Hosp, Hamilton, Bermuda[4]