© International Epidemiological AssociationInternational Journal of Epidemiology 2000;29:803–806 Printed in Great Britain

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Date: 2000-10-04 14:31:36		© International Epidemiological AssociationInternational Journal of Epidemiology 2000;29:803–806 Printed in Great Britain Add to Reading List Source URL: ije.oxfordjournals.org Download Document from Source Website File Size: 164,38 KB Share Document on Facebook