[1] Changzhi Maternal & Child Hlth Care Hosp, Dept Emergency, 48 Weiyuanmen Middle Rd, Changzhi 046000, Shanxi, Peoples R China
[2] Changzhi Maternal & Child Hlth Care Hosp, Dept Neonatol, Changzhi 046000, Shanxi, Peoples R China
[3] Changzhi Maternal & Child Hlth Care Hosp, Dept Pediat Resp, Changzhi 046000, Shanxi, Peoples R China
[4] Changzhi Maternal & Child Hlth Care Hosp, Dept Pediat Digest, Changzhi 046000, Shanxi, Peoples R China