1Johns Hopkins School of Medicine, Baltimore, Maryland
2University of Missouri, Columbia, Missouri
3Stanford Center for Sleep Sciences and Medicine, Stanford University, Palo Alto, California
4David Geffen School of Medicine at the University of California, Los Angeles, Los Angeles, California
5VA Greater Los Angeles Healthcare System, Geriatric Research, Education and Clinical Center, Los Angeles, California
6American Academy of Sleep Medicine, Darien, Illinois;
7Saint Thomas Medical Partners-Sleep Specialists, Nashville, Tennessee