Oh, the benefits of open publishing! I found this article fascinating, not just because it identified particular gene errors that are associated with stuttering, but because the genes in question are largely DIFFERENT for men and women, and for different ancestry groups (African, Asian, European, and Hispanic/American). As far as I know, there is no research that shows that the presentation of stuttering is different for men and women, nor is there research that shows differences in the presentation of stuttering across the ancestry groups. So how is it that different genes are causative, but the presentation of stuttering is the same? I don't doubt the validity of the research reported in this article, but I'm really surprised by the outcome.