Another unfortunate issue is we don't have fMRI's of these people when they were kids and originally diagnosed with ADHD. And it is a disease that is known to

Another unfortunate issue is we don't have fMRI's of these people when they were kids and originally diagnosed with ADHD. And it is a disease that is known to be / have been overdiagnosed a lot. It's quite possible that a number of these "cured" people were just misdiagnosed in the first place.