1 Oslo Sports Trauma Research Center, Department of Sports Medicine, Norwegian School of Sports Sciences, Oslo, Norway eirik.h.wik@gmail.com.
2 Aspetar Sports Injury and Illness Prevention Programme, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.
3 Institute of Sport and Exercise Medicine, Department of Exercise, Sport and Lifestyle Medicine, Faculty of Medicine and Health Sciences, Stellenbosch University, Stellenbosch, South Africa.