Chronic productive cough in young adults is very often due to chronic rhino-sinusitis.
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Corsico AG, et al. Among authors: zoia mc.
Monaldi Arch Chest Dis. 2007 Jun;67(2):90-4. doi: 10.4081/monaldi.2007.495.
Monaldi Arch Chest Dis. 2007.
PMID: 17695692