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Forest plots of drop out due to any cause (A), adverse effect (B), and drop out due to serious adverse effect (C) among ketamine/esketamine and control groups. SD, standard deviation; MH, Mantel-Haenszel; 95% CI, 95% confidence interval. x axis labels have been edited according to the characteristics of the outcome: since lower rates indicate better safety/tolerability the label “Favors ketamine” is on the left-hand side.
