1. Department of Internal Medicine II; Pneumology; University Hospital Regensburg; Regensburg
2. Research Centre; IUCPQ; Université Laval; Québec Canada
3. Department of Respiratory Medicine; Prince Phillip Hospital; Swansea College of Medicine; Llanelli Wales UK
4. Centre for Sleep Medicine; Hôpital Antoine Béclère; Clamart France
5. Centre for Pneumology; Donaustauf Hospital; Donaustauf Germany