Department of 0torhinolaryngology, Ulm University Medical Center, Ulm, Germany;
Apceth, Munich, Germany;
Institute of Pharmaceutical Technology, University of Leipzig, Leipzig, Germany;
Institute of Pharmaceutical Technology, University of Leipzig, Leipzig, Germany;
Department of 0torhinolaryngology, University of Duisburg-Essen, Essen, Germany;
Department of 0torhinolaryngology, University of Duisburg-Essen, Essen, Germany;
Department of 0torhinolaryngology, Ulm University Medical Center, Ulm, Germany;