title: Assessing the methodological quality of systematic reviews.
authors: Population Health Research Institute, St George's University of London, London, UK.
authors: Emma J
authors: EJ
authors: Welsh
authors: Population Health Research Institute, St George's University of London, London, UK.
authors: Rebecca A
authors: RA
authors: Normansell
authors: Population Health Research Institute, St George's University of London, London, UK.
authors: Christopher J
authors: CJ
authors: Cates
mesh_terms: D006801:Humans; D015201:Meta-Analysis as Topic; D029424:Pulmonary Disease, Chronic Obstructive / Q000628:therapy*