作者单位:Putian Univ, Dept Med Imaging, Affiliated Hosp, Putian, Peoples R China[1]Univ Sydney, George Inst Global Hlth, Sydney Med Sch, Camperdown, NSW, Australia[2]Putian Univ, Dep Gastrointestinal Surg, Affiliated Hosp, Putian, Peoples R China[3]Jinan Univ, Dept Gastroenterol Surg, Affiliated Hosp 1, Guangzhou, Guangdong, Peoples R China[4]