Margaret D. Weiss, MD, Ph.D., FRCP(C), is currently the Director of Clinical Research in Child Psychiatry at Cambridge Health Alliance, Cambridge, MA. She has specialized in diagnosis, treatment, and research in ADHD and other neurodevelopmental disorders in all age groups. She received her MD and Fellowship in Psychiatry from McGill University and her Ph.D. in the History of Science from Harvard University. Dr. Weiss has published over 150 articles relating to these topics. Dr. Weiss is known for her research demonstrating that melatonin is a safe and effective treatment for initial insomnia in ADHD. She is the author of the Weiss Functional Impairment Rating Scale, a widely used measure translated into 18 languages. She is on the advisory council of the Canadian Attention Deficit Disorder Resource Alliance and the American Professional Association for ADHD and Related Disorders, and the Scientific Program Committee of the World Federation of ADHD. .