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When and How Can Endpoints Be Changed after Initiation of a Randomized Clinical Trial?
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| Formato: | Texto |
| Lenguaje: | English |
| Publicado: |
Public Library of Science
2007
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| Materias: | |
| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1852589/ https://www.ncbi.nlm.nih.gov/pubmed/17443237 http://dx.doi.org/10.1371/journal.pctr.0020018 |