1. Department of Critical Care, The First Affiliated Hospital, Zhejiang University of Traditional Chinese Medicine, Hangzhou, Zhejiang 310053, P.R. China
2. Division of Gastroenterology, The First Affiliated Hospital, Zhejiang University of Traditional Chinese Medicine, Hangzhou, Zhejiang 310053, P.R. China
3. Department of Infectious Diseases, The First Affiliated Hospital, Zhejiang University of Traditional Chinese Medicine, Hangzhou, Zhejiang 310053, P.R. China