1. Pharmacy of Traditional Chinese Medicine, The First Affiliated Hospital of Qiqihar Medical University, Qiqihar, Heilongjiang 161000, P.R. China
2. Department of Gastroenterology, The First Affiliated Hospital of Qiqihar Medical University, Qiqihar, Heilongjiang 161000, P.R. China
3. Institute of Pharmacology, Qiqihar Medical University, Qiqihar, Heilongjiang 161000, P.R. China