[1] Sichuan Univ, West China Hosp, Dept Pediat Surg, Div Oncol, Chengdu 610041, Peoples R China
[2] Sichuan Univ, West China Hosp, Pediat Intens Care Unit, Chengdu 610041, Peoples R China
[3] Chengdu Women & Childrens Cent Hosp, Dept Vasc & Intervent Radiol, Chengdu 610091, Peoples R China
[4] Sichuan Univ, West China Univ Hosp 2, Pediat Intens Care Unit, Chengdu 610041, Peoples R China
[5] Sichuan Univ, West China Hosp, Dept Radiol, Chengdu 610041, Peoples R China