1. Department of Otorhinolaryngology, Head and Neck Surgery Medical University of Innsbruck Innsbruck Austria
2. Institute for Blood Transfusion and Immunological Department Medical University of Innsbruck Innsbruck Austria
3. Department of Anesthesiology and Intensive Care Medicine Medical University of Innsbruck Innsbruck Austria
4. Department of Otolaryngology – Head and Neck Surgery Rutgers New Jersey Medical School Newark New Jersey USA