50 Figure 3. Funnel plots displaying studies within and outside of 95% (dotted line) and 99% (dashed line) CI, for pain verbal suggestions with (A) and without (B) conditioning, and for itch verbal suggestions with (A) and without (B) conditioning. Magnitude of nocebo hyperalgesia based the timing of measurement All itch conditioning studies measured the nocebo effect as the mean of all evocation trials. Among pain studies that employed a combination of conditioning with verbal suggestion, however, 13 paradigms
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