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Published by Oxford University Press on behalf of the International Epidemiological Association ß The Author 2007; all rights reserved. Advance Access publication 27 July 2007 International Journal of Epidemiology 2007;
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Document Date: 2010-01-08 11:17:22
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Published by Oxford University Press on behalf of the International Epidemiological Association ß The Author 2007; all rights reserved. Advance Access publication 27 July 2007 International Journal of Epidemiology 2007;