1. Academic Center for Evidence based Sports Medicine (ACES), Academic Medical Center, Amsterdam, The Netherlands
2. Division of Exercise Science and Sports Medicine, University of Cape Town, Cape Town, South Africa
3. World Players’ Union (FIFPro), Players’ Services, Hoofddorp, The Netherlands
4. Coronel Institute of Occupational Health, Amsterdam Public Health Research Institute, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
5. De Sportartsen Groep, Sint Lucas Andreas Hospital, Amsterdam, The Netherlands
6. Football Club Utrecht, Utrecht, The Netherlands