1. From the Department of Otorhinolaryngology, St. Anna Krankenhaus, Duisburg, Germany (Dr Windfuhr); Department of Otorhinolaryngology, University Hospital RWTH, Aachen, Germany (retired) (Dr Schloendorff); Department of Otorhinolaryngology, Philipps University of Marburg, Marburg, Germany (Dr Sesterhenn); Department of Anatomy, University Hospital RWTH, Aachen, Germany (Dr Prescher); and Department of Otorhinolaryngology, University Hospital, Maastricht, The Netherlands (Dr Kremer).