1. Department of Pulmonary Medicine Marmara University Istanbul Turkey
2. Department of Cardiology Sahlgrenska University Hospital/Ostra Gothenburg Sweden
3. Division of Pulmonary, Allergy, and Critical Care Medicine University of Pittsburgh School of Medicine Pittsburgh Pennsylvania
4. Department of Pulmonary Medicine School of Medicine Koc University Istanbul Turkey
5. Sahlgrenska Academy University of Gothenburg Gothenburg Sweden
6. Department of Clinical Sciences, Respiratory Medicine and Allergology Faculty of Medicine Lund University Lund Sweden