1. Department of Gastroenterology, The First Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine, Harbin, Heilongjiang 150001, P.R. China
2. The Graduate School, Heilongjiang University of Traditional Chinese Medicine, Harbin, Heilongjiang 150001, P.R. China
3. Department of Gynaecology, The First Affiliated Hospital of Heilongjiang University of Traditional Chinese Medicine, Harbin, Heilongjiang 150001, P.R. China
4. Department of Gastroenterology, Heilongjiang Academy of Traditional Chinese Medicine, Harbin, Heilongjiang 150001, P.R. China