^*The plot indicates that there are likely unpublished studies that found nonsignificant results since the plot does not have a symmetric funnel shape tapering down as the variance (horizontal axis) gets smaller. Smaller variances indicate larger sample sizes. The studies with larger sample sizes would have less variability in results versus the studies with smaller sample sizes. One would expect the graphed points to have a “funnel” shape if all studies using rTMS including those showing no effect had been published. From Kozel and George. (8)