Affiliation: | 2. Department of Otolaryngology-Head and Neck Surgery, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai,China;3. Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, USA;4. Department of Oral and Maxillofacial Surgery, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou, China;5. Department of Otolaryngology-Head and Neck Surgery, Guangdong General Hospital and Guangdong Academy of Medical Sciences, Guangzhou, China |