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. 1992 Sep 26;305(6856):757-9.
doi: 10.1136/bmj.305.6856.757.

Confounding in epidemiological studies: why "independent" effects may not be all they seem

G D Smith  1 , A N Phillips
Affiliations

Confounding in epidemiological studies: why "independent" effects may not be all they seem

G D Smith et al. BMJ. .
No abstract available

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References

    1. JAMA. 1989 Mar 17;261(11):1593-8 - PubMed
    1. Am J Med. 1983 Sep 26;75(3A):4-11 - PubMed
    1. Am J Epidemiol. 1988 Sep;128(3):570-8 - PubMed
    1. Lancet. 1992 Mar 21;339(8795):744-5 - PubMed
    1. Stat Med. 1992 May;11(7):953-61 - PubMed

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