Thank you all for the positive reception of my post, I see that many people in this group have a problem with this, I believe in you that you will also succeed, this method has a direct impact on the stimulation of speech centers in the brain, which can contribute to the development of brain connections responsible for speech, in December I will have the first procedure, from what I know you need to do 10-20 series to see lasting results, I will update everything for you, I am sending the link: https://pmc.ncbi.nlm.nih.gov/articles/PMC5240850/