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Impact of active placebo controls on estimated drug effects in randomised trials: a systematic review of trials with both active placebo and standard placebo.
Laursen DR, Nejstgaard CH, Bjørkedal E, Frost AD, Hansen MR, Paludan-Müller AS, Prosenz J, Werner CP, Hróbjartsson A. Laursen DR, et al. Among authors: prosenz j. Cochrane Database Syst Rev. 2023 Mar 6;3(3):MR000055. doi: 10.1002/14651858.MR000055.pub2. Cochrane Database Syst Rev. 2023. PMID: 36877132 Free PMC article.