1. Department of Head and Neck Surgery; The University of Texas MD Anderson Cancer Center; Houston TX
2. Department of Otorhinolaryngology-Head and Neck Surgery Changhai Hospital; Second Military Medical University; Shanghai China
3. Department of Epidemiology; The University of Texas MD Anderson Cancer Center; Houston TX
4. Department of Otolaryngology-Head and Neck Surgery; Yuhuangding Hospital of Qingdao University; Yantai China
5. Division of Biostatistics and Human Genetics Center; University of Texas School of Public Health; Houston TX
6. Department of Stomatology Jinling Hospital; School of Medicine, Nanjing University, Southern Medical University; Nanjing China
7. Department of Head and Neck Surgery; Sichuan Cancer Hospital; Chengdu China