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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 for the ISAYA Study Group
European Respiratory Journal 22 (3) 413-417; DOI: 10.1183/09031936.03.00121103 Published 1 September 2003