1. Drexel University College of Medicine, Philadelphia, Pennsylvania, USA.
2. Department of Orthopaedic Surgery, Seton Hall–Hackensack Meridian School of Medicine, South Orange, New Jersey, USA.
3. Department of Orthopedics, University of Colorado School of Medicine, Aurora, Colorado, USA.
4. Department of Orthopaedics, Tulane University School of Medicine, New Orleans, Louisiana, USA.