Are treatments more effective than placebos? A systematic review and meta-analysis.
<p><strong>Background.</strong> Placebos are widely used in clinical practice in spite of ethical restrictions. Whether such use is justified depends in part on the relative benefit of placebos compared to ‘active’ treatments. A direct test for differences between placebo and ‘acti...
| Những tác giả chính: | , , , , , , , , |
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| Định dạng: | Journal article |
| Ngôn ngữ: | English |
| Được phát hành: |
Public Library of Science
2013
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