1. Department of Orthopedic Surgery, Rigshospitalet, University of Copenhagen, Blegdamsvej 3, 2100 Copenhagen, Denmark
2. Department of Plastic Surgery and Burns Treatment, Rigshospitalet, University of Copenhagen, Blegdamsvej 3, 2100 Copenhagen, Denmark
3. Department of Pathology, Rigshospitalet, University of Copenhagen, Blegdamsvej 3, 2100 Copenhagen, Denmark
4. Department of Orthopaedic Surgery, Tumor Section, Aarhus University Hospital, Palle Juul-Jensen Blvd, 8200 Aarhus, Denmark