A retrospective cohort study of <29-week-gestation infants with evolving BPD defined at age 28 days within the Pediatric Health Information System database. Controlling for observed confounding with ...
Complex genetic diseases are those with multiple environmental and genetic components contributing to the cumulative risk. Case–control association studies of genetic polymorphisms in complex genetic ...
A behind-the-scenes blog about research methods at Pew Research Center. For our latest findings, visit pewresearch.org. Identifying causal relationships from observational data is not easy. Still, ...
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