1. Duke University Medical Center, Department of Orthopedic Surgery, Durham, North Carolina, USA
2. Sports Orthopedic Research Centre–Copenhagen (SORC-C), Department of Orthopedic Surgery, Copenhagen University Hospital, Amager-Hvidovre, Copenhagen, Denmark
3. Physical Medicine & Rehabilitation Research–Copenhagen (PMR-C) and Departments of Orthopaedic Surgery and Physical Therapy, Copenhagen University Hospital, Copenhagen, Denmark
4. AMC, Amsterdam Center of Evidence Based Sports Medicine (ACES), Amsterdam, North Holland, The Netherlands
5. Aspetar Sports Groin Pain Center, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar