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Population versus hospital controls for case-control studies on cancers in Chinese hospitals
BACKGROUND: Correct control selection is crucial to the internal validity of case-control studies. Little information exists on differences between population and hospital controls in case-control studies on cancers in Chinese hospital setting. METHODS: We conducted three parallel case-control studi...
Autores principales: | Li, Lin, Zhang, Min, Holman, D'Arcy |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3261130/ https://www.ncbi.nlm.nih.gov/pubmed/22171783 http://dx.doi.org/10.1186/1471-2288-11-167 |
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