Objective: To investigate the cause of chronic cough in children.
目的：探讨小儿慢性咳嗽的病因。
Objective To investigate the cause and specific treatment of chronic cough.
目的探讨慢性咳嗽病因及特异性治疗方法。
Objective To study the etiology of pertinacious chronic cough in children.
目的探讨小儿难治性慢性咳嗽的病因。
Objective To study the cause of the chronic cough.
目的：探讨慢性咳嗽的病因。
Objective To study the cause of the chronic cough.
目的：探讨慢性咳嗽的病因。
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