1. Department of Gastroenterology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
2. Department of Gastroenterology, the Third People’s Hospital of Chengdu, the Affiliated Hospital of Southwest Jiaotong University, Chengdu, China
3. North Sichuan Medical College, Nanchong, China
4. Department of Pharmacy, the Third People’s Hospital of Chengdu, the Affiliated Hospital of Southwest Jiaotong University, Chengdu, China