RT Journal Article SR Electronic T1 Is this the beginning of unravelling the puzzle of COPD exacerbations? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 376 OP 378 DO 10.1183/09031936.05.00076205 VO 26 IS 3 A1 R. Rodríguez-Roisin YR 2005 UL http://erj.ersjournals.com/content/26/3/376.abstract AB