1. Center for Sleep and Vigilance Disorders Department of Internal Medicine and Clinical Nutrition Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
2. Sleep Disorders Center, Department of Respiratory Medicine Medical School University of Crete Heraklion Greece
3. Department of Chemistry Faculty of Sciences Atatürk University Erzurum Turkey
4. Department of Pharmacy Services Nihat Delibalta Göle Vocational High School Ardahan University Ardahan Turkey
5. Sleep Disorders Center Pulmonary Department Sahlgrenska University Hospital Gothenburg Sweden
6. Department of Biochemistry Faculty of Pharmacy Anadolu University Eskişehir Turkey