Junliang Yuan1, Yanhong Wu2, Jianyu Hao3, Wenli Hu4. 1. Department of Neurology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China. 2. Department of Gastroenterology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China. 3. Department of Gastroenterology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China. haojianyu@medmail.com.cn. 4. Department of Neurology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, 100020, China. wenlihu3366@126.com.