1. Department of Polymer Science and Engineering, University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China
2. Division of Gastroenterology, The First Affiliated Hospital of USTC, Division of Life Science and Medicine, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
3. Undergraduate major in clinical medicine, grade 2017, class 1, Medical College of Hubei University of Science and Technology, Xianning, Hubei 437100, P. R. China