RT Journal Article SR Electronic T1 From the authors JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1131 OP 1131 DO 10.1183/09031936.00102108 VO 32 IS 4 A1 Calverley, P. M. A. A1 Albert, P. YR 2008 UL https://publications.ersnet.org//content/32/4/1131.1.abstract AB