title: Respiratory questionnaires in COPD.
authors.forename: J
authors.initials: J
authors.lastname: Williams
authors.forename: S J
authors.initials: SJ
authors.lastname: Singh
authors.forename: M D
authors.initials: MD
authors.lastname: Morgan
mesh_terms: D006305:Health Status Indicators; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000628:therapy*; D011795:Surveys and Questionnaires