1. First Unit of Department of Cardiology, First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China;
2. Heilongjiang University of Chinese Medicine, Harbin, China;
3. Third Unit of Department of Cardiology, First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China;
4. Fourth Unit of Department of Cardiology, First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, China