[1] Chongqing Med Univ, Childrens Hosp, Dept Neurol, Chongqing 400014, Peoples R China
[2] 5th Peoples Hosp Guilin, Dept Pediat, Guilin, Guang Xi Prov, Peoples R China
[3] Chongqing Med Univ, Childrens Hosp, Dept Primary Child Hlth Care, Chongqing 400014, Peoples R China
[4] Chongqing Med Univ, Childrens Hosp, Pediat Res Inst, Chongqing 400014, Peoples R China