World Journal of Emergency Surgery

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A critical appraisal of epidemiological studies comes from basic knowledge: a reader's guide to assess potential for biases

Stefania Boccia*, Giuseppe La Torre, Roberto Persiani, Domenico D'Ugo, Cornelia M van Duijn and Gualtiero Ricciardi

World Journal of Emergency Surgery 2007, 2:7 doi:10.1186/1749-7922-2-7

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