1. Rugby Research and Injury Prevention Group, New York, New York
2. Lenox Hill Hospital, New York, New York
3. University of Medicine and Dentistry of New Jersey, School of Public Health, Newark, New Jersey
4. Alberta Health Services, Medical Physiatry, Calgary, Canada
5. Tulane University, School of Medicine, New Orleans, Louisiana
6. Professional Orthopaedic and Sports Physical Therapy, New York, New York
7. Hospital for Special Surgery, New York, New York