1. William Beaumont Army Medical Center/Texas Tech University Health Sciences Center, El Paso, Texas, USA
2. Texas Tech University Health Sciences Center, El Paso, Texas, USA
3. Robbins College of Health and Human Sciences, Baylor University, Waco, Texas, USA
4. School of Medicine and Health Sciences, George Washington University, Washington, District of Columbia, USA
5. Department of Orthopedics, Carthage Area Hospital, Carthage, New York, USA
6. Department of Orthopedics, Claxton-Hepburn Medical Center, Ogdensburg, New York, USA