1. Department of Gastroenterology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei Province 441021, China
2. Medical School of Xiangyang Vocational and Technical College, Xiangyang, Hubei Province 441022, China
3. School of Cosmetology, Yichun University, Yichun, Jiangxi Province 336000, China
4. School of Nursing, Yichun Vocational Technical College, Yichun, Jiangxi Province 336028, China