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Access controls on bmj.com: Where's the evidence for restricting access?
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| 主要作者: | |
|---|---|
| 格式: | Artigo |
| 語言: | Inglês |
| 出版: |
BMJ Publishing Group Ltd.
2005
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| 主題: | |
| 在線閱讀: | https://ncbi.nlm.nih.gov/pmc/articles/PMC558029/ https://ncbi.nlm.nih.gov/pubmed/15905271 |
| 標簽: |
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