RT Journal Article SR Electronic T1 Minimal important difference of change in patient-specific goals in severe emphysema patients JF ERJ Open Research JO erjor FD European Respiratory Society SP 00459-2020 DO 10.1183/23120541.00459-2020 VO 6 IS 4 A1 Jorine E. Hartman A1 Karin Klooster A1 T. David Koster A1 Marlies van Dijk A1 Dirk-Jan Slebos YR 2020 UL http://openres.ersjournals.com/content/6/4/00459-2020.abstract AB