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Review
. 2008 Apr;34(2):83-7.

Causation, bias and confounding: a hitchhiker's guide to the epidemiological galaxy. Part 1. Principles of causality in epidemiological research: time order, specification of the study base and specificity

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  • PMID: 18413019
Free article
Review

Causation, bias and confounding: a hitchhiker's guide to the epidemiological galaxy. Part 1. Principles of causality in epidemiological research: time order, specification of the study base and specificity

Samuel Shapiro. J Fam Plann Reprod Health Care. 2008 Apr.
Free article
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