RT Journal Article SR Electronic T1 The superexacerbator phenotype in patients with COPD: a descriptive analysis JF ERJ Open Research JO erjor FD European Respiratory Society SP 00235-2018 DO 10.1183/23120541.00235-2018 VO 5 IS 2 A1 Lowie E.G.W. Vanfleteren A1 Lotte M.C. Boonen A1 Martijn A. Spruit A1 Daisy J.A. Janssen A1 Emiel F.M. Wouters A1 Frits M.E. Franssen YR 2019 UL http://openres.ersjournals.com/content/5/2/00235-2018.abstract AB