1. Department of Pulmonary Medicine, School of Medicine, Marmara University, Istanbul 34854, Turkey
2. Department of Pulmonary Medicine, School of Medicine, Koç University, Istanbul 34450, Turkey
3. Department of Thoracic Surgery, School of Medicine, Marmara University, Istanbul 34854, Turkey
4. Department of Cardiology, School of Medicine, Marmara University, Istanbul 34854, Turkey
5. Department of Molecular and Clinical Medicine, University of Gothenburg, 405 30 Gothenburg, Sweden
6. Department of Respiratory Medicine and Allergology, Faculty of Medicine, Lund University, 221 00 Lund, Sweden
7. Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
8. Division of Pulmonary, Allergy, and Critical Care Medicine, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15260, USA