Nice find! Excuse my ignorance. What makes this peer reviewed? And idk...I dont know if it's worth 40% improvement +/-. like I said in my other response, not sure if other people know the ramificafions if these placements arent done right. I had failed cervical surgery and they want to put a stimulator in my sacral area. And I am looking into the stimulator, and you read all these stories about the leads migrating, scar tissue, permanent issues, or it works for a year and then nothing. But now we're talking about the brain! Scary stuff.