title: Postnasal drip and chronic cough.
mesh_terms: D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D003371:Cough / Q000209:etiology*; D006801:Humans; D007223:Infant; D009093:Mucus / Q000378:metabolism*; D009297:Nasal Mucosa / Q000378:metabolism; D014132:Trachea / Q000378:metabolism