title: Clinical and prognostic heterogeneity of C and D GOLD groups.
authors.affiliation: Thorax Institute, Hospital Clinic, IDIBAPS, University of Barcelona and CIBER Enfermedades Respiratorias (CIBERES), Barcelona, Spain alvar.agusti@clinic.ub.es.
authors.forename: Alvar
authors.initials: A
authors.lastname: Agustí
authors.affiliation: Dept of Pulmonary and Critical Care Medicine, University of Nebraska Medical Center, Omaha, NE, USA.
authors.forename: Stephen
authors.initials: S
authors.lastname: Rennard
authors.affiliation: Clinical Statistics, GlaxoSmithKline R&D, Research Triangle Park, NC, USA.
authors.forename: Lisa D
authors.initials: LD
authors.lastname: Edwards
authors.affiliation: ELEGI Labs, University of Edinburgh, Edinburgh, UK.
authors.forename: William
authors.initials: W
authors.lastname: MacNee
authors.affiliation: Dept of Respiratory Medicine, Maastricht University Medical Center, Maastricht, The Netherlands.
authors.forename: Emiel
authors.initials: E
authors.lastname: Wouters
authors.affiliation: Respiratory Therapy Area Unit, GlaxoSmithKline R&D, King of Prussia, PA, USA.
authors.forename: Bruce
authors.initials: B
authors.lastname: Miller
authors.affiliation: Respiratory Therapy Area Unit, GlaxoSmithKline R&D, King of Prussia, PA, USA.
authors.forename: Ruth
authors.initials: R
authors.lastname: Tal-Singer
authors.affiliation: Worldwide Epidemiology, GlaxoSmithKline R&D, Uxbridge, England.
authors.forename: Hana
authors.initials: H
authors.lastname: Mullerova
authors.affiliation: Dept of Respiratory Medicine, Brigham and Women's Hospital, Boston, MA, USA.
authors.forename: Bartolomé
authors.initials: B
authors.lastname: Celli
mesh_terms: D000368:Aged; D003430:Cross-Sectional Studies; D005260:Female; D005541:Forced Expiratory Volume; D006760:Hospitalization; D006801:Humans; D053208:Kaplan-Meier Estimate; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011446:Prospective Studies; D029424:Pulmonary Disease, Chronic Obstructive / Q000145:classification / Q000175:diagnosis* / Q000503:physiopathology*; D016896:Treatment Outcome