RT Journal Article SR Electronic T1 Assessment of severity and prognosis in COPD: moving beyond percent of predicted JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP 1801005 DO 10.1183/13993003.01005-2018 VO 52 IS 2 A1 Culver, Bruce H. YR 2018 UL http://erj.ersjournals.com/content/52/2/1801005.abstract AB