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Factors That Can Affect the External Validity of Randomised Controlled Trials
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Formato: | Texto |
Lenguaje: | English |
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Public Library of Science
2006
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1488890/ https://www.ncbi.nlm.nih.gov/pubmed/16871331 http://dx.doi.org/10.1371/journal.pctr.0010009 |
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