© International Epidemiological AssociationInternational Journal of Epidemiology 2001;30:427–432 Printed in Great Britain

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Date: 2010-01-07 14:46:05		© International Epidemiological AssociationInternational Journal of Epidemiology 2001;30:427–432 Printed in Great Britain Add to Reading List Source URL: www.epidemiology.ch Download Document from Source Website File Size: 165,60 KB Share Document on Facebook