1. Department of Gastroenterology, The First People's Hospital of Taicang, Taicang Affiliated Hospital of Soochow University, Soochow Medical College of Soochow University, Suzhou, Jiangsu 215400, P.R. China
2. Central Laboratory, The First People's Hospital of Taicang, Taicang Affiliated Hospital of Soochow University, Soochow Medical College of Soochow University, Suzhou, Jiangsu 215400, P.R. China
3. School of Pharmacy, Soochow Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China