1. Department of Orthopaedic Surgery, St. Joseph's University Medical Center, Paterson, NJ, USA
2. Department of Radiology, University of Colorado School of Medicine, Aurora, CO, USA
3. Millennium Institute of Sport and Health, Auckland, New Zealand
4. Southern California Hip Institute, North Hollywood, CA, USA
5. Department of Anatomy, Otago School of Medical Sciences, University of Otago, Dunedin, New Zealand
6. Department of Orthopaedic Surgery, University of Connecticut School of Medicine, Farmington, CT, USA
7. Department of Orthopedics, University of Colorado School of Medicine, Aurora, CO, USA