1. Department of Gastroenterology, School of Clinical Medical, Jiamusi University, Jiamusi, 154007, Heilongjiang Province, China
2. Department of Medical Oncology, The Seventh Hospital of Qiqihar, Qiqihar, 161000, Heilongjiang Province, China
3. Department of Neurology, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, 161000, Heilongjiang Province, China
4. Department of Gastroenterology, The First Hospital of Qiqihar, Qiqihar, 161000, Heilongjiang Province, China