From the *Department of Anesthesiology, Toronto Western Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada; †Toronto Sleep and Pulmonary Centre, Toronto, Ontario, Canada; ‡Department of Psychiatry and Behavioral Sciences, Stanford Center for Sleep Sciences and Medicine, University of California, Palo Alto, California; §Division of Pulmonary and Critical Care Medicine, University of California, San Diego, San Diego, California.