1. Department of Integrated Traditional Chinese & Western Medicine, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China
2. Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
3. Department of Gastroenterology, Affiliated Hospital of Guilin Medical University, Guilin, Guangxi 541001, China
4. Department of Dermatology, Third Xiangya Hospital, Central South University, Changsha 410013, China
5. Department of Integrated Traditional Chinese and Western Medicine, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China