It was in 1902 that physician George F. Still first documented what is now known as attention deficit/hyperactivity disorder (ADHD) , and despite more than a century of research, its exact cause is still not fully understood.
It was in 1902 that physician George F. Still first documented what is now known as attention deficit/hyperactivity disorder (ADHD) , and despite more than a century of research, its exact cause is still not fully understood.