[1] Harvard Med Sch, Massachusetts Gen Hosp, Dept Orthopaed Surg, Boston, MA USA
[2] Univ Zurich Hosp, Dept Traumatol, Zurich, Switzerland
[3] Univ Groningen, Univ Med Ctr Groningen, Dept Plast Surg, Groningen, Netherlands
[4] Univ Texas Austin, Dell Med Sch, 1400 Barbara Jordan Blvd,Suite 2-834,MC R1800, Austin, TX 78723 USA