1 Department of Gastroenterology, Shanghai Changhai Hospital, The First Affiliated Hospital of Naval Medical University, Shanghai, China.
2 Department of Gastroenterology, Shanghai Changhai Hospital, The First Affiliated Hospital of Naval Medical University, Shanghai, China; Department of Gastroenterology, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China; Department of Pharmacology, College of Pharmacy, Naval Medical University, Shanghai, China.