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Additional file 1: of Primary versus secondary source of data in observational studies and heterogeneity in meta-analyses of drug effects: a survey of major medical journals

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posted on 2018-09-27, 05:00 authored by Guillermo Prada-Ramallal, Fatima Roque, Maria Herdeiro, Bahi Takkouche, Adolfo Figueiras
Excluded articles. List of articles excluded with reasons for exclusion. (PDF 247 kb)

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    BMC Medical Research Methodology

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    Observational studiesMeta-analysisSource of dataHeterogeneityDrugOver-the-counterOut-of-pocket

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