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. 2021 Sep 24;4(9):e2125531. doi: 10.1001/jamanetworkopen.2021.25531

Figure 3. Main Placebo Effect Size of Included rTMS, Invasive Brain Stimulation, Parenteral, Ayahuasca, and Overall Studies.

Figure 3.

Studies were grouped by treatment modality and pooled. Ayahuasca is a South American psychoactive brew. rTMS indicates repetitive transcranial magnetic stimulation.