[1] Qingdao Univ, Affiliated Hosp, Dept Emergency Paediat, Qingdao, Peoples R China
[2] Qingdao Univ, Affiliated Hosp, Dept Pediat Intens Care Unit, Qingdao, Peoples R China
[3] Qingdao Univ, Affiliated Hosp, Dept Pediat Hematol, Clin Hematol, Qingdao 266003, Shandong, Peoples R China