1. Institute of Pathology; University Hospital Erlangen; Erlangen Germany
2. Institute of Pathology; St Vincent's Hospital; Karlsruhe Germany
3. Institute of Pathology; SRH-Klinikum; Gera Germany
4. Department of ENT; Head and Neck Surgery; University Hospital Erlangen; Erlangen Germany
5. Division Molecular Genome Analysis; German Cancer Research Center; Heidelberg Germany