1. Physical Medicine and Rehabilitation Research—Copenhagen (PMR-C), Departments of Physical Therapy and Orthopedic Surgery, Hvidovre University Hospital, Copenhagen, Denmark
2. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
3. Department of Orthopedic Surgery O, Odense University Hospital, Odense, Denmark
4. Department of Orthopedic Surgery, Bispebjerg University Hospital, Copenhagen, Denmark