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