1 Department of Gastroenterology and Hepatology, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu, 610031, Sichuan, China.
2 Department of Gastroenterology and Hepatology, The Third People's Hospital of Chengdu, The Affiliated Hospital of Southwest Jiaotong University, Chengdu, 610031, Sichuan, China. xbsun1197@163.com.