1. Department of Otolaryngology-Head and Neck Surgery, Yuhuangding Hospital of Qingdao University, Yantai, China
2. Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
3. Department of Central Laboratory, Yuhuangding Hospital of Qingdao University, Yantai, China
4. Department of Clinical Laboratory, Yuhuangding Hospital of Qingdao University, Yantai, China
5. Department of Pathology, Yuhuangding Hospital of Qingdao University, Yantai, China
6. Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA