1. Department of Orthopedic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
2. Department of Orthopedic Surgery, Newton-Wellesley Hospital, Newton, MA, USA.
3. Rothman Orthopaedic Institute at Thomas Jefferson University, Philadelphia, PA, USA.
4. Department of Orthopaedic Surgery, Section of Adult Joint Reconstruction, Rush Presbyterian-St. Luke’s Medical Center, Chicago, IL, USA.
5. Pennsylvania Hospital, Hospital of the University of Pennsylvania, Philadelphia, PA, USA.