1. Microbiome Division, Department of Gastroenterology and Hepatology, The First Medical Center, Chinese PLA General Hospital, Beijing, China
2. School of Medicine, Nankai University, Tianjin, China
3. Department of Neurology, The First Medical Center, Chinese PLA General Hospital, Beijing, China
4. National Clinical Research Center for Geriatric Diseases, Chinese PLA General Hospital, Beijing, China