American Academy of Otolaryngology - Head and Neck Surgery American Head and Neck Society Argentina: Asociacion Argentina de Cirugia de Cabeza y Cuello Asian Society of Head and Neck Oncology Australian & New Zealand Head and Neck Society Australian Society of Otolaryngology/Head and Surgery Belgian Head and Neck Oncologic Cooperative Group Brazilian Society of Head and Neck Surgery British Association of Head and Neck Oncology Canadian Society of Otolaryngology/Head and Neck Surgery Chile: Sociedad Chilena de Cirugia Cabeza-Cuello Y Plastico Maxilo Facial Danish Society for Head and Neck Oncology Digpal Dharkar Egyptian Organization for Head and Neck Oncology EORTC Head and Neck Group European Head and Neck Society European Laryngological Society Germany: Deutsche Gesellschaft fur Hals-Nasen-Ohren-Heilkunde, Kopf-und Hals-Chirugie Head and Neck Tumors Study Group Hong Kong Head and Neck Society Indian Society of Head and Neck Oncology Israeli Society for Head and Neck Surgery and Oncology Italy: Societa Italiana di Chirugia Oncologica Japan Society for Head and Neck Cancer Korean Society for Head and Neck Oncology Mexican Society of Oncology New Zealand Society of Otolaryngology-Head and Neck Surgery Pakistan: The Head and Neck Oncology Society of Pakistan Polish Head and Neck Oncological Society Scandinavian Society for Head and Neck Oncology Sociedad Espanola de Cirujanos de Cabeza & Cuello Sociedad Peruana de Cirugia de Cabeza, Cuello Y Maxilo Facial South African Society for Head and Neck Oncology South American Head and Neck Society Taiwan Otolaryngological Society Thai Head and Neck Society