1. Department of Otorhinolaryngology-Head and Neck Surgery; Klinikum der Universität München; Marchioninistr. 15 81377 Munich Germany
2. Laser-Forschungslabor, LIFE-Zentrum; Klinikum der Universität München; Feodor-Lynen-Str. 19 81377 Munich Germany
3. Department of Urology; Klinikum der Universität München; Marchioninistr. 15 81377 Munich Germany
4. Clinical Cooperation Group “Personalized Radiotherapy of Head and Neck Tumors”; Helmholtz Zentrum; München Germany