Objective: to investigate the content of trace element in hair and the condition of immune function in patients with recurrent respiratory infection (RRI).
目的：探讨反复性呼吸道感染患儿头发中微量元素含量及机体免疫功能状态。
Objective to study the relationship between recurrent respiratory infection (RRI) and gastroesophageal reflux (GER) in children.
目的探讨小儿反复呼吸道感染(RRI)与胃食管返流(GER)的关系。
Aim: to investigate therapy methods for children With recurrent respiratory tract infection (RRI).
目的：探讨治疗反复呼吸道感染(RRI)的方法。
Aim: to investigate therapy methods for children With recurrent respiratory tract infection (RRI).
目的：探讨治疗反复呼吸道感染(RRI)的方法。
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