Chronic productive cough in young adults is very often due to chronic rhino-sinusitis by Corsico, A G, Villani, S, Zoia, M C, Niniano, R, Ansaldo, E, Cervio, G, Quaresima, P M, Gatto, E, Crippa, E, Marinoni, A, Foresi, A, Pozzi, E, Cerveri, I

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