[1] Sichuan Prov Peoples Hosp, Sichuan Acad Med Sci, Dept Pediat Surg, Chengdu 610072, Peoples R China
[2] Sichuan Prov Peoples Hosp, Sichuan Acad Med Sci, Ctr Children Med, Chengdu 610072, Peoples R China
[3] Fudan Univ, Dept Pediat Surg, Childrens Hosp, Shanghai 201102, Peoples R China
[4] Fudan Univ, Pediat Res Inst, Childrens Hosp, Shanghai 201102, Peoples R China