1 FIFPRO (Football Players Worldwide), Hoofddorp, The Netherlands v.gouttebarge@amsterdamumc.nl.
2 Amsterdam UMC, University of Amsterdam, Department of Orthopaedic Surgery, Amsterdam Movement Sciences, Meibergdreef 9, Amsterdam, The Netherlands.
3 Section Sports Medicine, University of Pretoria, Pretoria, South Africa.
4 Amsterdam Collaboration on Health & Safety in Sports (ACHSS), Amsterdam UMC IOC Research Center of Excellence, Amsterdam, The Netherlands.
5 Royal Netherlands Football Association (KNVB), FIFA Medical Center of Excellence, Zeist, The Netherlands.
6 French Football Federation (FFF), Clairefontaine Medical Centre, FIFA Medical Center of Excellence, Clairefontaine, France.
7 Wits Sport and Health (WiSH), School of Clinical Medicine, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg-Braamfontein, South Africa.