Imran S. Khawaja, MD, MBBS, FAASMMedical DirectorCenter for Sleep Medicine,VA North Texas Healthcare SystemDallas, TX Associate ProfessorDepartment of Psychiatry and Neurology and NeurotherapeuticsUT Southwestern Medical Center4500 S Lancaster RoadDallas, TX 72516 Thomas D. Hurwitz, MD, DLFAPA, FAASMMinneapolis VA Health Care System, Hennepin County Medical Center Sleep Disorder Center, andAssistant professor of psychiatry, University of Minnesota Medical School, Minneapolis, MNMinneapolis VAMC, mail code 111N1 Veterans DriveMinneapolis, MN 55417