The efficacy paradox in randomized controlled trials of CAM and elsewhere: beware of the placebo trap.
Walach
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D000529:Complementary Therapies; D006801:Humans; D015990:Placebo Effect; D011786:Quality Control; D011897:Random Allocation; D016032:Randomized Controlled Trials as Topic / Q000379:methods* / Q000592:standards*