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Impact of preconception enrollment on birth enrollment and timing of exposure assessment in the initial vanguard cohort of the U.S. National Children’s Study
BACKGROUND: The initial vanguard cohort of the U.S. National Children’s Study was a pregnancy and birth cohort study that sought to enroll some women prior to pregnancy, and to assess exposures early in pregnancy. METHODS: During the recruitment phase (2009–2010), geographically based sampling was u...
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| Publicado no: | BMC Med Res Methodol |
|---|---|
| Main Authors: | , , , , |
| Formato: | Artigo |
| Idioma: | Inglês |
| Publicado em: |
BioMed Central
2015
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| Assuntos: | |
| Acesso em linha: | https://ncbi.nlm.nih.gov/pmc/articles/PMC4581516/ https://ncbi.nlm.nih.gov/pubmed/26399430 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1186/s12874-015-0067-1 |
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