bibliographic entry 11912333 [be/11912333]
https://w3id.org/oc/corpus/be/11912333
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Egger, M, Davey Smith, G, Schneider, M, Minder, C. Bias in meta-analysis detected by a simple, graphical test, BMJ, 1997, 315, 7109, 629, 634, PMID: 9310563
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