1. Sleep-Wake Disorders Unit, Soroka University Medical Center, and Department of Physiology, Beer-Sheva, Israel
2. Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
3. Department of Economics and Statistics, Clalit Health Care Services, Beer-Sheva, Israel
4. Department of Pediatrics, Soroka University Medical Center, Beer-Sheva, Israel
5. Department of Health Policy and Management, Ben-Gurion University of the Negev, Beer-Sheva, Israel