Department of Surgery, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, China. Department of Surgery, Chicago Comer Children's Hospital, University of Chicago, United States. Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, China. Department of Clinic Nutrition, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, China. Department of Clinic Nutrition, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, China. Electronic address: lihongscmc@aliyun.com.