Margaret Weiss, MD, PhD, FRCP(C), is a Clinical Professor in Psychiatry at the University of British Columbia. She has specialized in diagnosis, treatment and research in ADHD in all age groups. She received her MD and Fellowship in Psychiatry from McGill University and her PhD in the History of Science from Harvard University. Dr. Weiss has published over 90 peer-reviewed articles in major medical journals. She is the author of two book chapters on ADHD, and coauthored the book ADHD in Adulthood: A Guide to Current Theory, Diagnosis, and Treatment. 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 thirteen languages. She opened Weiss ADHD Care January 1, 2013 to improve access to multi-disciplinary and multi-modal care for adults and children with ADHD.