Department of Gastroenterology and Hepatology,The First Affiliated Hospital of Sun Yat-sen University,Guangzhou,Guangdong 510080,China

Division of Gastroenterology,Union Hospital of Tongji Medical College,Huazhong University of Science and Technology,Wuhan,Hubei 430032 China

Department of Gastroenterology,Shengjing Hospital of China Medical University,Shenyang,Liaoning 110055,China

Department of Gastroenterology,The Third Affiliated Hospital of Sun Yat-sen University,Guangzhou,Guangdong 510620,China

Department of Gastroenterology,The First Affiliated Hospital of Nanchang University,Nanchang,Jiangxi 330209,China

Department of Gastroenterology,Henan Provincial People's Hospital,People's Hospital of Zhengzhou University,School of Clinical Medicine,Henan University,Zhengzhou,Henan 540003,China

Department of Gastroenterology,The Affiliated Drum Tower Hospital of Nanjing University Medical School,Nanjing,Jiangsu 210008,China

Department of Gastroenterology,Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine,Shanghai 200031,China

Department of Gastroenterology,Wenzhou Central Hospital,Wenzhou,Zhejiang 325102,China

Department of Gastroenterology,Peking University First Hospital,Beijing 100034,China