1. Department of Respiratory Medicine, State University of Medicine and Pharmacy “Nicolae Testemitanu,” Republic of Moldova, Chisinau, Moldova
2. Chest Centre, Aintree University Hospitals NHS Foundation Trust, Liverpool, United Kingdom
3. Department of Systems Medicine, Università degli Studi di Roma “Tor Vergata,” Rome, Italy
4. University General Hospital, Department of Thoracic Medicine, Stavrakia, Heraklion, Greece