1 Vorona RD et al. Overweight and obese patients in a primary care population report less sleep than patients with a normal body mass index. Arch Intern Med 2005;165(1):25–30
2 Wittchen HU et al. NISAS-2000: The Nationwide Insomnia Screening and Awareness Study. Prevalence and interventions in primary care. Fortschritte der Medizin. Originalien 2001;119(1):9–19