Zi-Yuan Zou1, Jian-Gao Fan2. 1. Center for Fatty Liver, Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China; Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong, China. 2. Center for Fatty Liver, Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China; Shanghai Key Lab of Pediatric Gastroenterology and Nutrition, Shanghai 200092, China. Electronic address: fanjiangao@xinhuamed.com.cn.