Chronic cough is a common respiratory symptom in children.
慢性咳嗽是儿童呼吸系统常见的症状。
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 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 of chronic cough in children.
目的：探讨小儿慢性咳嗽的病因。
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