1. Department of Otorhinolaryngology; Head and Neck Surgery; University of Cologne; Cologne Germany
2. Center for Integrated Oncology Köln Bonn; University of Cologne; Cologne Germany
3. Institute for Pathology; University of Cologne; Cologne Germany
4. Center for Molecular Medicine Cologne; University of Cologne; Cologne Germany
5. Department of Radiation Oncology; University of Cologne; Cologne Germany
6. Jean-Uhrmacher Institute; University of Cologne; Cologne Germany