Objective To investigate the levels of blood zinc protoporphyrin (ZPP) and prevalence of iron deficiency in 5333 children aged 2~7 in 4 cities of northern China.
目的调查我国北方4市城区2～ 7岁儿童末梢全血锌原卟啉（ZPP）水平和铁缺乏症患病率。
Objective to explore zinc protoporphyrin (ZPP) level and distribution in children.
目的研究工业区儿童锌卟啉水平及其分布规律。
The values of zinc protoporphyrin (ZPP) in the blood of 536 normal children are investigated.
本文报告536例正常小儿全血锌原卟啉的测定值。
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