[1] University of Muenster,Department of Cranio
[2] Central German Armed Forces Hospital,Maxillofacial Surgery
[3] Klinikum Osnabrueck,Department of Oral and Maxillofacial Surgery
[4] University Medical Center Hamburg-Eppendorf,Institute of Pathology
[5] Katharinenhospital Stuttgart,Institute of Tumor Biology, Center of Experimental Medicine
[6] University of Muenster,Department of Maxillofacial Surgery