1. Department of Cardiology III, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, Heilongjiang, China
2. Department of Cardiology I, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, Heilongjiang, China
3. Department of Gastroenterology I, The Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, Heilongjiang, China