1 Department of Otorhinolaryngology, Regensburg University Hospital, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany. constantin.hintschich@klinik.uni-regensburg.de.
2 Department of Otorhinolaryngology, Regensburg University Hospital, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany.
3 Department of Otorhinolaryngology, Mainz University Hospital, Mainz, Germany.
4 Center for Rhinology and Allergology, Wiesbaden, Germany.