1. Clinic of Pneumology and Pulmonary Cell Research University Hospital Basel Switzerland
2. Department of Pneumology Medical Center ‐ University of Freiburg, Faculty of Medicine, University of Freiburg Freiburg Germany
3. Laboratory of Pharmacology, Department of Medicine Aristotle University of Thessaloniki Thessaloniki Greece
4. Department of Respiratory Medicine University of Ioannina Ioannina Greece