[Yan, Haipeng; Yuan, Yuanhong; Xiao, Zhenghui; Lu, Xiulan] Univ South China, Hunan Childrens Hosp, Dept Pediat Emergency Ctr, Changsha 410007, Peoples R China.
[Li, Xun] Univ South China, Hunan Childrens Hosp, Pediat Res Inst Hunan Prov, Changsha, Peoples R China.
[Hu, Xian; Zeng, Saizhen] Hunan Normal Univ, Hunan Prov Peoples Hosp, Affiliated Hosp 1, Changsha, Peoples R China.
[Zhu, Yimin] Hunan Normal Univ, Affiliated Hosp 1, Hunan Prov Peoples Hosp, Emergency Med Inst Hunan Prov, Changsha 410005, Peoples R China.