RT Journal Article SR Electronic T1 Predictive accuracy of patient-reported exacerbation frequency in COPD JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 501 OP 507 DO 10.1183/09031936.00035909 VO 37 IS 3 A1 J.K. Quint A1 G.C. Donaldson A1 J.R. Hurst A1 J.J.P. Goldring A1 T.R. Seemungal A1 J.A. Wedzicha YR 2011 UL http://erj.ersjournals.com/content/37/3/501.abstract AB Markup server — Error Error There was a problem handling your request. Please try again in a few minutes, or contact us if you continue to experience this problem.