[1] Univ Mississippi, Med Ctr, Dept Radiol, Jackson, MS 39216 USA
[2] Univ Mississippi, Med Ctr, Dept Orthopaed Surg, Jackson, MS 39216 USA
[3] Washington Univ, Sch Med, Mallinckrodt Inst Radiol, Musculoskeletal Sect, St Louis, MO USA
[4] Barnes Jewish Hosp, St Louis, MO 63110 USA