Director, Center for Circadian Medicine and Gulf Coast Sleep Institute; former professor Brown and University of Texas Medical Schools; author of "The Power of Rest," "Designed to Last," "The Body ...view moreDirector, Center for Circadian Medicine and Gulf Coast Sleep Institute; former professor Brown and University of Texas Medical Schools; author of "The Power of Rest," "Designed to Last," "The Body Clock Advantage" and other books; internationally recognized expert on public health and restview less