1. Department of Otorhinolaryngology, Head and Neck Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, P.R. China
2. Department of Physiology, School of Basic Medical Sciences, Anhui Medical University, Hefei, Anhui 230022, P.R. China
3. Department of Gastroenterology and Hepatology, The Fourth Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, P.R. China
4. Department of Neurology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, P.R. China