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Int J Epidemiol. 2000 Dec;29(6):1102. doi: 10.1093/oxfordjournals.ije.a019909.

An introduction To instrumental variables for epidemiologists.

International journal of epidemiology

Greenland

PMID: 11101554 DOI: 10.1093/oxfordjournals.ije.a019909

[No abstract available.]

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