How is dopamine and stuttering correlated?

How is dopamine and stuttering correlated? I've noticed that people frequently mention 'dopamine' in this stuttering subreddit. It would be highly productive if someone could compile recent research findings on the connection between dopamine and stuttering. ([https://www.google.com/search?q=dopamine+%22research%22+%22stuttering%22](https://www.google.com/search?q=dopamine+%22research%22+%22stuttering%22)) And, post these recent findings in here.