1. Department for Medical Biometry and Epidemiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;
2. Koc University Research Center for Translational Medicine, Istanbul, Turkey;
3. Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts;
4. Department of Molecular and Clinical Medicine, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden;
5. Department of Internal Medicine, Skaraborg Hospital, Lidköping, Sweden;
6. Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania;
7. Department of Pulmonary Medicine, Koc University School of Medicine, Istanbul, Turkey; and