1. Department of Head and Neck Surgery The University of Texas MD Anderson Cancer Center Houston Texas
2. Department of Otolaryngology Head and Neck Surgery Faculty of Medicine Mansoura University Mansoura Egypt
3. Department of Thoracic Head and Neck Medical Oncology The University of Texas MD Anderson Cancer Center Houston Texas
4. Department of Radiation Oncology The University of Texas MD Anderson Cancer Center Houston Texas
5. Department of Neurosurgery The University of Texas MD Anderson Cancer Center Houston Texas