1. Department of Otolaryngology-Head and Neck Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, China
2. Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
3. Department of Otolaryngology-Head and Neck Surgery, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, China
4. Department of Otolaryngology-Head and Neck Surgery, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong 264000, China
5. Department of Otolaryngology-Head and Neck Surgery, The 2nd Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230601, China
6. Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA