1. Amsterdam Collaboration on Health and Safety in Sports, Department of Public and Occupational Health, Amsterdam Movement Sciences, Amsterdam UMC , Amsterdam 1081 BT, The Netherlands
2. Amsterdam UMC, University of Amsterdam, Department Public and Occupational Health, Amsterdam Public Health Research Institute, Amsterdam, The Netherlands. Academic Medical Centre , Meibergdreef 9, Amsterdam 1105 AZ, The Netherlands
3. Health Care Section, Royal Netherlands Marechaussee, Plein-Kalvermarkt-Complex , Den Haag 2511 CB, The Netherlands