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Written informed consent and selection bias in observational studies using medical records: systematic review
Objectives To determine whether informed consent introduces selection bias in prospective observational studies using data from medical records, and consent rates for such studies. Design Systematic review. Data sources Embase, Medline, and the Cochrane Library up to March 2008, reference lists from...
Autores principales: | Kho, Michelle E, Duffett, Mark, Willison, Donald J, Cook, Deborah J, Brouwers, Melissa C |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
BMJ Publishing Group Ltd.
2009
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2769263/ https://www.ncbi.nlm.nih.gov/pubmed/19282440 http://dx.doi.org/10.1136/bmj.b866 |
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