1. Department of Health Inspection and Quarantine, the School of Public Health, Fujian Medical University, Fuzhou, 350122, Fujian, China
2. Department of Gastroenterology, Shengli Clinical Medical College of Fujian Medical University, Fuzhou, Fujian, China
3. Department of Gastroenterology, Fujian Provincial Hospital, Fuzhou, Fujian, China
4. Department of Neurosurgery, Union Hospital Affiliated of Fujian Medical University, Fuzhou 350001, Fujian, China