RT Journal Article SR Electronic T1 From the authors JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1066 OP 1067 DO 10.1183/09031936.00019907 VO 29 IS 5 A1 P. Palange A1 S. A. Ward YR 2007 UL http://erj.ersjournals.com/content/29/5/1066.abstract AB