Statistics in Medicine: Calculating confidence intervals for relative risks (odds ratios) and standardised ratios and ratesBr Med J (Clin Res Ed) 1988; 296 doi: http://dx.doi.org/10.1136/bmj.296.6632.1313 (Published 07 May 1988) Cite this as: Br Med J (Clin Res Ed) 1988;296:1313
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