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BMJ. 2003 Jan 25;326(7382):219.

Interaction revisited: the difference between two estimates.

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  • 1Cancer Research UK Medical Statistics Group, Centre for Statistics in Medicine, Institute for Health Sciences, Oxford OX3 7LF. doug.altman@cancer.org.uk

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PMID:
12543843
[PubMed - indexed for MEDLINE]
PMCID:
PMC1125071
Free PMC Article
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