title: Is MEDLINE alone enough for a meta-analysis?
authors.forename: Y
authors.initials: Y
authors.lastname: Bai
authors.forename: J
authors.initials: J
authors.lastname: Gao
authors.forename: D
authors.initials: D
authors.lastname: Zou
authors.forename: Z
authors.initials: Z
authors.lastname: Li
mesh_terms: D003625:Data Collection / Q000379:methods*; D016206:Databases, Bibliographic; D016239:MEDLINE / Q000592:standards*; D015201:Meta-Analysis as Topic; D015983:Selection Bias