1. Medical University of Graz, Department
of Orthopaedic Surgery, Auenbruggerplatz 5, Graz A-8036, Austria.
2. Institute of Chemistry - Analytical Chemistry,
Karl-Franzens-University of Graz, Stremayrgasse
16/ III, Graz A-8010, Austria.
3. Medical University of Graz, Institute
of Medical Informatics, Statistics and Documentation, Auenbruggerplatz
2, Graz A-8036, Austria.
4. HELIOS Klinikum, Department
of Orthopaedic Oncology, Berlin-Buch Schwanebecker Chaussee
50, Berlin D-13125, Germany.
5. Medical University of Vienna, Department
of Orthopaedic Surgery, Waehringer Guertel
18-20, Vienna A-1090, Austria.