I wish I could say. I'm 42 and have had a stutter my entire life. Ups and downs of battling it. I think I just stopped blaming it for my short comings and made my skills undeniable. The confidence that it gave. believe it or reduced my stuttering I work in a field where interviewing means multiple rounds with multiple people, teams etc. I try to manage my stress levels which helps. That just means eat well, sleep well, rigorous exercise and laughter