目的：了解反复呼吸道感染与血清中微量元素锌、硒含量的关系。
Objective: to study relation between children with recurrent respiratory trace infection and zine, selenium in serum.
目的：探讨复发性口腔溃疡(RAU)患者血清中微量元素含量及细胞免疫功能状态。
Objective: To investigate the content of trace element in serum and the condition of cell-mediated immunity in patients with recurrent aphthous ulceration (RAU).
目的探讨肝硬变患者血清中微量元素含量的变化。
Objective To study the change of serum trace elements in patients with liver cirrhosis.
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