1. Center for Sleep and Wakefulness Disorders, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
2. Department of Respiratory and Critical Care Medicine, Johns Hopkins University, Baltimore, USA
3. ochschule Mannheim - University of Applied Sciences, Department of Information Technology, Mannheim, Germany
4. Department of Respiratory Medicine, Allergology and Sleep Medicine, Klinikum Nuremberg/ Paracelsus Medical University, Nuremberg, Germany
5. Department of Pulmonary Medicine, Bethanien Hospital, Solingen, Germany
6. Department of Cardiology, University Hospital Charité, Berlin, Germany
7. Department of Pulmonary Medicine, Bethesda Hospital, Wuppertal, Germany