![](https://www.pdfsearch.io/img/1fe27985381c478da871a0de5f57b5df.jpg) Date: 2010-01-06 15:38:03
| | International Journal of Epidemiology © International Epidemiological Association IncVol. 13, No. 1 Printed in Great BritainAdd to Reading ListSource URL: www.epidemiology.chDownload Document from Source Website File Size: 521,18 KBShare Document on Facebook
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