1. New York Medical College School of Medicine, New York Medical College, Valhalla, New York
2. Department of Orthopedic Surgery, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
3. The School of Medicine at the University of Dublin, Trinity College of Dublin, Dublin, Ireland
4. The University of Texas Rio Grande Valley School of Medicine, Edinburg, Texas
5. Department of Orthopedic Surgery, University of Pennsylvania, Philadelphia, Pennsylvania