1 Department of Gastroenterology and Hepatology, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, China.
2 Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA.
3 Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, Ohio, USA.
4 Department of Radiology, Hospital Clínic de Barcelona, Barcelona, Spain.