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Chronic cough and phlegm in young adults
I. Cerveri, S. Accordini, A. Corsico, M.C. Zoia, L. Carrozzi, L. Cazzoletti, M. Beccaria, A. Marinoni, G. Viegi, R. de Marco
European Respiratory Journal 22 (3) 413-417; DOI: 10.1183/09031936.03.00121103 Published 1 September 2003