1. Department of Orthopedic Surgery, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
2. Department of Radiology, Nemours/Alfred I. duPont Hospital for Children, Wilmington, Delaware, USA
3. Department of Radiology, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
4. Department of Orthopedic Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania, USA
5. Rothman Institute, Philadelphia, Pennsylvania, USA