1. Department of Hematology and Oncology; Charité University Medicine; Berlin Germany
2. Department of Experimental Pharmacology; Max Delbrueck Center; Berlin Germany
3. Department of Maxillio-Facial Surgery; Charité University Medicine; Berlin Germany
4. Department of ENT; Charité University Medicine; Berlin Germany
5. Department of Pathology; Charité University Medicine; Berlin Germany
6. Department of ENT; St. Gertrauden Hospital Berlin; Berlin Germany
7. EPO-Experimental Pharmacology and Oncology GmbH; Berlin Germany
8. Charité Cancer Comprehensive Center; Berlin Germany