1 1Department of Orthopedics, Nemours/A. I. duPont Hospital for Children, Wilmington, DE; 2International Federation of Sports Medicine (FIMS), Lausanne, SWITZERLAND; 3Department of Family and Community Medicine, University of Toronto, Toronto, Ontario CANADA; 4Collaborating Centre of Sports Medicine, University of Brighton, Eastbourne, UNITED KINGDOM; 5Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Rome, ITALY; 6Orthopaedic Center Theresie, Munich, Germany; 7International Bobsleigh and Skeleton Federation (IBSF), Lausanne, SWITZERLAND; 8LifeCare Prahran Sports Medicine, Victoria, AUSTRALIA; 9Centre for Exercise and Sports Medicine, Faculty of Health Sciences, University of the Witwatersrand, South Africa; and 10Centre for Sport and Exercise Science and Medicine (SESAME), University of Brighton, Carlisle Road, Eastbourne, UNITED KINGDOM.