title: "Opinions differ significantly": Early experiences with meta-analysis and the people who made it possible.
authors.affiliation: Duke University, Durham, NC, USA.
authors.forename: Harris
authors.initials: H
authors.lastname: Cooper
mesh_terms: D035843:Biomedical Research / Q000266:history*; D002986:Clinical Trials as Topic / Q000266:history*; D003627:Data Interpretation, Statistical; D049673:History, 20th Century; D049674:History, 21st Century; D015201:Meta-Analysis as Topic; D012107:Research Design; D012196:Review Literature as Topic
keywords: early history; meta-analysis; research synthesis; systematic review