1. Sportrehab Sports Medicine Clinic, Stampgatan 14, SE-411 01Gothenburg, Sweden
2. Unit of Physiotherapy, Department of Health and Rehabilitation, Institute of Neuroscience and Physiology,Sahlgrenska Academy, University of Gothenburg, Box 455, SE-405 30 Gothenburg, Sweden
3. Sahlgrenska Sports Medicine Center, Gothenburg, Sweden
4. Department of Orthopaedics, Sahlgrenska University Hospital, Mölndal, Sweden
5. Clinica Ortopedica e Traumatologica II, IRCCS Istituto Ortopedico Rizzoli, Bologna, Italy
6. Education and Research Department, Isokinetic Medical Group, FIFA Medical Centre of Excellence, Bologna, Italy
7. Swedish Olympic Committee, Stockholm, Sweden