Randomized, controlled trials, observational studies, and the hierarchy of research designs (Q24670544)
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scientific article
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Randomized, controlled trials, observational studies, and the hierarchy of research designs |
scientific article |
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Randomized, controlled trials, observational studies, and the hierarchy of research designs (English)
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22 June 2000
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342
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1887-92
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25
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