1. Department of Gastroenterology, Affiliated Hospital of Nantong University, Nantong, P.R. China.
2. Medical College, Nantong University, Nantong, P.R. China.
3. Office of Infection Management, Affiliated Hospital of Nantong University, Nantong, P.R. China.
4. Department of Laboratory Medicine, Affiliated Hospital of Nantong University, Nantong, P.R. China.
5. Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, Nantong, P.R. China.