RT Journal Article SR Electronic T1 Bronchodilator reversibility in COPD: the roguish but harmless little brother of airway hyperresponsiveness? JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 6 OP 7 DO 10.1183/09031936.05.00052805 VO 26 IS 1 A1 E. F. Hansen A1 J. Vestbo YR 2005 UL http://erj.ersjournals.com/content/26/1/6.abstract AB