Michael V. Vitiello, PhD is Professor of Psychiatry & Behavioral Sciences, University of Washington, Seattle. He is an internationally recognized expert in sleep, circadian rhythms and sleep disorders in aging. His research, funded by the National Institutes of Health, focus on the causes, consequences and treatments of disturbed sleep, circadian rhythms and cognition in older adults. He is the author of over 650 scientific articles, reviews, chapters, editorials and abstracts and his work has been cited over 40,000 times. His current work focuses on improving the sleep of osteoarthritis patients to reduce both their osteoarthritis-related symptoms such as pain, fatigue and depression, and their healthcare utilization and related costs. He has served as: the Editor-in-Chief of Sleep Medicine Reviews, President of the Sleep Research Society; the Sleep Research Society Foundation; Chair of the Sleep Disorders Research Advisory Board, National Institutes of Health; Scientific Program Chair of the Associated Professional Sleep Societies; a board member of the Sleep Research Society, the Society of Behavioral Sleep Medicine, and National Sleep Foundation; and on numerous editorial boards.