The query "Cough" is broad. Let me clarify before diving deep.

Cough has a wide differential organized by duration and mechanism. Let me pull the authoritative textbook content.

Good finds. Let me read the most relevant sections - the pulmonology textbook (Fishman's, Murray & Nadel's) and the Symptom-to-Diagnosis guide for the differential, in parallel.

Now let me also pull the Fishman's table on cough causes and the Family Medicine section, and do a quick PubMed search for recent evidence.

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