1. Department of Orthopedic Surgery, Baylor University Medical Center, Dallas, Texas
2. Coptic Medical Association of North America Research Institute, Manlius, New York
3. Department of Orthopedic Surgery, Methodist Hospital, Houston, Texas
4. Johns Hopkins University School of Medicine, Baltimore, Maryland
5. University of Texas Health Sciences Center, Houston, Texas
6. Department of Orthopedic Surgery, Indiana University-Purdue University of Indianapolis, Indianapolis, Indiana
7. Department of Orthopedic Surgery, Scottish Rite Hospital for Children, Dallas, Texas