1. Department of Otolaryngology, Intensive Care Medicine and Pain Therapy, Unfallkrankenhaus Berlin, Charité Medical School, Berlin.
2. Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Unfallkrankenhaus Berlin, Charité Medical School, Berlin.
3. Department of Otorhinolaryngology-Head and Neck Surgery, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany.