1Department of Orthopedic Surgery, Medical University of Graz, Graz, Austria2Department of Internal Medicine, Division of Oncology, General Hospital Fürstenfeld, Furstenfeld, Austria3Clinical Institute for Medical and Chemical Laboratory Diagnosis, Medical University of Graz, Graz, Austria4Department of Therapeutic Radiology and Oncology, Medical University of Graz, Graz, Austria5Department of Dentistry and Maxillofacial Surgery, Medical University of Graz, Graz, Austria