1. Department of Orthopaedic Surgery, Georgetown University Hospital, Washington, DC, USA
2. The Rothman Institute at Thomas Jefferson University, Philadelphia, Pennsylvania, USA
3. Georgetown University School of Medicine, Washington, DC, USA
4. Midwest Orthopaedics at Rush, Chicago, Illinois, USA
5. Department of Orthopaedic Surgery and Sports Medicine, University of Kentucky, Lexington, Kentucky, USA
6. Department of Orthopedics, Einstein Healthcare Network, Philadelphia, Pennsylvania, USA
7. Department of Orthopaedic Surgery, Allegheny General Hospital, Pittsburgh, Pennsylvania, USA
8. Department of Orthopedics, Inova Fairfax Hospital, Falls Church, Virginia, USA