| Affiliation: | 1. Department of Otolaryngology–Head and Neck Surgery, University of Rochester Medical Center, Rochester, New York, U.S.A.;2. Institute of Medical Statistics, Informatics and Epidemiology, University of Cologne, Cologne, Germany;3. Department of Otolaryngology–Head and Neck Surgery, Centre Hospitalier de l'Université de Montreal (CRCHUM) and McGill University Health Centre, Montreal, Quebec, Canada;4. Bayer HealthCare Pharmaceuticals, Pine Brook, New Jersey, U.S.A.;5. Bayer HealthCare Pharmaceuticals, Toronto, Ontario, Canada |
