1Department of Gastroenterology, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Hainan
2Department of Gastroenterology, Hainan General Hospital, Hainan Affiliated Hospital of Hainan Medical University, Hainan
3Department of Cardiovascular Internal Medicine II, The Second Affiliated Hospital of Guangdong Medical University, Guangdong
4The Second Department of Cancer Center, The Second Affiliated Hospital of Guangdong Medical University, Guangdong, China