1. Department of Otolaryngology, Head and Neck SurgeryFriedrich‐Alexander‐Universität Erlangen‐Nürnberg Erlangen Germany
2. Department of Otolaryngology, Massachusetts Eye and Ear InfirmaryHarvard Medical School Boston Massachusetts USA
3. Department of PathologyFriedrich‐Alexander‐Universität Erlangen‐Nürnberg Erlangen Germany