1. Istituto per la Ricerca e l’Innovazione Biomedica, National Research Council, Palermo, Italy
2. Sleep Disorders Centre, Antoine-Béclère Hospital, Clamart, France
3. Second Department of Respiratory Medicine, Institute of Tuberculosis and Lung Diseases, Warsaw, Poland
4. Department of Respiratory Medicine and Tuberculosis, P.J. Safarik University, Kosice, Slovakia
5. Department of Chest Diseases, Ege University, Izmir, Turkey
6. Sleep Disorders Center, Department of Respiratory Medicine, University of Crete, Heraklion, Greece
7. Respiratory Failure Unit, G. Papanikolaou Hospital, Aristotle University of Thessaloniki, Greece
8. Department of Respiratory Medicine, Hospital de Santa Maria, CHULN, Lisbon, Portugal
9. Multidisciplinary Sleep Disorders Centre, Antwerp University Hospital, Antwerp, Belgium
10. Department of Sleep Medicine, Sahlgrenska University Hospital, Gothenburg, Sweden
11. Biomedical Department of Internal and Specialistic Medicine, University of Palermo, Italy