American Journal of Epidemiology ª The AuthorPublished by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. This is an Open Access article distributed under the terms of t

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Date: 2013-06-06 11:08:20		American Journal of Epidemiology ª The AuthorPublished by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. This is an Open Access article distributed under the terms of t Add to Reading List Source URL: nersp.osg.ufl.edu Download Document from Source Website File Size: 150,22 KB Share Document on Facebook