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1. Is the placebo powerless? An analysis of clinical trials comparing placebo with no treatment.

作者: A Hróbjartsson.;P C Gøtzsche.
来源: N Engl J Med. 2001年344卷21期1594-602页
Placebo treatments have been reported to help patients with many diseases, but the quality of the evidence supporting this finding has not been rigorously evaluated.
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