1. Department of Hand, Plastic, Reconstructive and Burn Surgery, BG Klinik, Eberhard Karls University, Tuebingen, Germany.
2. Department of Tumor Orthopedics and Sarcoma Surgery, University Hospital Essen, Essen, Germany.
3. Department of Plastic and Reconstructive Surgery, St. Rochus Hospital, Castrop-Rauxel, Germany.
4. Department of Medical Oncology, Sarcoma Center, West German Cancer Center, University Hospital Essen, Essen, Germany.