RT Journal Article SR Electronic T1 From the authors JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 703 OP 704 DO 10.1183/09031936.00158608 VO 33 IS 3 A1 D. Bouros A1 G. Giannakoulas YR 2009 UL http://erj.ersjournals.com/content/33/3/703.abstract AB