1. Department of Head & Neck Surgery, National Cancer Center, National Clinical Research Center for Cancer, Cancer Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, P.R. China
2. Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, P.R. China
3. Shanxi Medical University, Taiyuan, P.R. China
4. Linfen Meternity & Child Healthcare Hospital, Linfen, P.R. China