1. Hai-jing Cui:
Department of Children’s Health, Children’s Hospital of Hebei Province, Shijiazhuang 050011, Hebei, P.R. China.
2. Peng Liu:
Department of Medical Insurance, Children’s Hospital of Hebei Province, Shijiazhuang 050011, Hebei, P.R. China.
3. Xin-guang Liu:
Department of Medical Laboratory, Children's Hospital of Hebei Province,Shijiazhuang 050011, Hebei,P.R. China
4. Wen-zhong Du:
Department of Quality Control, Children's Hospital of Hebei Province,Shijiazhuang 050011, Hebei,P.R. China
5. Xia Wang:
Department of Children’s Health, Children’s Hospital of Hebei Province, Shijiazhuang 050011, Hebei, P.R. China.