1. Penn State Milton S. Hershey Medical Center, Penn State College of Medicine, Hershey, Pennsylvania, USA
2. Memorial Hermann Hospital - Texas Medical Center, MGovern Medical School at UTHealth, UT Physicians Orthopedics Trauma, Houston, Texas, USA
3. MGovern Medical School at UTHealth, Houston, Texas, USA
4. Department of Orthopaedics, Harborview Medical Center, Seattle, Washington, USA