1. Department of Gastroenterology, Liangzhu Hospital, Hangzhou, Zhejiang 311113, P.R. China
2. The Second Central Laboratory, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310006, P.R. China
3. Department of Emergency, The Third Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310005, P.R. China