ADHD. http://www.med.umich.edu/yourchild/topics/adhd.htm http://www.med.umich.edu/yourchild/topics/adhd.htm http://www.med.umich.edu/yourchild/topics/adhd.htm UMICH: How common is ADHD? http://www.med.umich.edu/yourchild/topics/adhd.htm http://www.med.umich.edu/yourchild/topics/adhd.htm ADHD: What Parents Need to Know http://www.med.umich.edu/yourchild/topics/adhd.htm ADHD http://www.med.umich.edu/yourchild/topics/adhd.htm