1. Department of Orthopedic Surgery, Odense University Hospital, Odense, Denmark
2. Department of Orthopedic Surgery, Hospital of Southern Denmark, Odense, Denmark
3. Clinic of Orthopaedic Surgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
4. Department of Endocrinology, Odense University Hospital, Odense, Denmark