1. Department of Otolaryngology-Head and Neck Surgery; Johns Hopkins Hospital; Baltimore Maryland
2. Université Paris Descartes Sorbonne Paris Cité, Hôpital Européen Georges-Pompidou, Assitance Publique des Hôpitaux de Paris; Department of Otorhinolaryngology-Head and Neck Surgery; Paris France
3. The Center for Head and Neck Cancer, Department of Otolaryngology-Head and Neck Surgery; The University of Pennsylvania Medical Center and Health System; Philadelphia Pennsylvania
4. Department of Head and Neck Surgery; The University of Texas, MD Anderson Cancer Center; Houston Texas U.S.A