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The increasing trend of observational studies in clinical research: Have we forgotten and started defying the hierarchy?
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Wolters Kluwer - Medknow
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7989480/ https://www.ncbi.nlm.nih.gov/pubmed/33776107 http://dx.doi.org/10.4103/ija.IJA_176_21 |
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