American Journal of Epidemiology ª The AuthorPublished by the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: . Vol.

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Date: 2010-11-18 09:55:15		American Journal of Epidemiology ª The AuthorPublished by the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: . Vol. Add to Reading List Source URL: www.biostat.jhsph.edu Download Document from Source Website File Size: 429,11 KB Share Document on Facebook