1. Amsterdam UMC, University of Amsterdam, Department of Orthopedic Surgery, Amsterdam Movement Sciences, Amsterdam, the Netherlands
2. Academic Center for Evidence-based Sports medicine (ACES), Amsterdam, the Netherlands
3. Amsterdam Collaboration for Health and Safety in Sports (ACHSS), AMC/VUmc IOC Research Center, Amsterdam, the Netherlands
4. The Sport Physician Group, Department of Sports Medicine, OLVG, Amsterdam, the Netherlands
5. Department of Orthopedic Surgery and Sports Medicine, Erasmus MC University Medical Center, Rotterdam, the Netherlands
6. Aspetar Sports Groin Pain Centre, Aspetar Orthopedic and Sports Medicine Hospital, Doha, Qatar
7. Sport medicine and exercise clinic Haarlem (SBK), Haarlem, the Netherlands
8. Department of Sports Medicine, Bergman Clinics, Naarden, the Netherlands
9. Department of General Practice, Erasmus University Medical Center, Rotterdam, the Netherlands
10. Aspetar Orthopedic and Sports Medicine Hospital, Doha, Qatar
11. for the PRIMA Study Group