1. Department of Orthopaedic Surgery, Landstuhl Regional Medical Center, Landstuhl, Germany
2. Department of Orthopaedic Surgery, Brigham and Women’s Hospital, Boston, MA, USA
3. Concord Orthopaedics, Concord, NH, USA
4. Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Boston, MA, USA