There’s also a medication-based program. The doctor is also a stutterer in remission. YouTube, ‘Dr. Gerald Maguire’ https://youtube.com/watch?v=u_7GWKEOrdk&feature=share There's also the other Dr. MCGUIRE who has a successful program based on breath control. YouTube: https://youtu.be/bNkOeIBKZNs Good luck, Sue