1. Department of Head and Neck Surgery, Division of Surgery, Division of Cancer Prevention and Population Science, The University of Texas MD Anderson Cancer Center, Houston, Texas.
2. Department of Surgery, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand.
3. Department of Biostatistics, Division of Cancer Prevention and Population Science, The University of Texas MD Anderson Cancer Center, Houston, Texas.
4. Department of Endocrine Neoplasia and Hormonal Disorders, Division of Internal Medicine, Division of Cancer Prevention and Population Science, The University of Texas MD Anderson Cancer Center, Houston, Texas.
5. Department of Pathology, Division of Pathology and Laboratory Medicine, Division of Cancer Prevention and Population Science, The University of Texas MD Anderson Cancer Center, Houston, Texas.
6. Department of Surgical Oncology, Division of Surgery, and Division of Cancer Prevention and Population Science, The University of Texas MD Anderson Cancer Center, Houston, Texas.
7. Department of Epidemiology, Division of Cancer Prevention and Population Science, The University of Texas MD Anderson Cancer Center, Houston, Texas.