Institution: | 1. Department of Cardiology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China;2. Department of Gastroenterology, The Fourth Affiliated Hospital of Harbin Medical University, Harbin 150001, Heilongjiang Province, China;3. The Central Hospital of the Heilongjiang Prison Administrative Bureau, Harbin 150001, Heilongjiang Province, China |