1. Department of Clinical Medicine, Guizhou Medical University, Guiyang, China
2. Key Laboratory of Endemic and Ethnic Diseases, Ministry of Education & Key Laboratory of Medical Molecular Biology of Guizhou Province, Guizhou Medical University, Guiyang, China
3. Department of Geriatrics, The Affiliated Hospital of Guizhou Medical University, Guiyang, China
4. Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Guizhou Medical University, Guiyang, China.