RT Journal Article SR Electronic T1 Lung-function changes over time following withdrawal of inhaled corticosteroids in patients with severe COPD JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP ERJ-01644-2015 DO 10.1183/13993003.01644-2015 A1 Helgo Magnussen A1 Kay Tetzlaff A1 Eric D. Bateman A1 Henrik Watz A1 Anne M. Kirsten A1 Emiel F.M. Wouters A1 Bernd Disse A1 Helen Finnigan A1 Roberto Rodriguez-Roisin A1 Peter M.A. Calverley YR 2015 UL http://erj.ersjournals.com/content/early/2015/11/19/13993003.01644-2015.abstract AB