1. Orthopaedic Surgery, Medical University of South Carolina, Charleston, South Carolina, USA
2. Department of Orthopaedic Surgery, Stanford University, Stanford, California, USA
3. Department of Surgery, Faculty of Medicine, Dalhousie University, Halifax Nova Scotia, Canada
4. University of Utah, Department of Orthopaedic Surgery, Salt Lake City, Utah, USA
5. Department of Orthopaedic Surgery, Henry Ford Health System, Detroit, Michigan, USA
6. Department of Orthopedic Surgery, Duke University, Durham, North Carolina, USA
7. Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada
8. Nashville Hip Institute, Nashville, Tennessee, USA
9. Department of Orthopaedic Surgery, Stanford University, Redwood City, California, USA