1. Department of Sports Traumatology M51; Bispebjerg-Frederiksberg Hospital; Copenhagen Denmark
2. Department of Biomedical Sciences; Faculty of Health and Medical Sciences; Center for Healthy Aging; University of Copenhagen; Copenhagen Denmark
3. Department of Orthopaedic Surgery M; Institute of Sports Medicine; Bispebjerg-Frederiksberg Hospital; Copenhagen Denmark
4. Medical Faculty; Institute for Dental Research and Oral Musculoskeletal Biology, and Center for Biochemistry; University of Cologne; Cologne Germany