1. Department of Otolaryngology-Head and Neck Surgery; Guangdong General Hospital and Guangdong Academy of Medical Sciences; Guangzhou Guangdong China
2. Department of Head and Neck Surgery; The University of Texas MD Anderson Cancer Center; Houston Texas
3. Department of Epidemiology; The University of Texas MD Anderson Cancer Center; Houston Texas
4. Department of Oral and Maxillofacial Surgery; Guangdong General Hospital and Guangdong Academy of Medical Sciences; Guangzhou Guangdong China
5. Department of Otolaryngology-Head and Neck Surgery; the Affiliated Yantai Yuhuangding Hospital of Qingdao University; Yantai Shandong China
6. Department of Otolaryngology and Head and Neck Surgery; the 2nd Affiliated Hospital of Anhui Medical University; Hefei Anhui China
7. Department of Biostatistics; The University of Texas MD Anderson Cancer Center; Houston Texas
8. Duke Cancer Institute; Duke University Medical Center; Durham North Carolina