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Issue Date | Title | Author(s) | Type | Access Type |
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Sep-2018 | Primary versus secondary source of data in observational studies and heterogeneity in meta-analyses of drug effects: a survey of major medical journals | Prada-Ramallal, Guillermo; Roque, Fátima; Herdeiro, Maria Teresa; Takkouche, Bahi; Figueiras, Adolfo | article |
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