1. IRCCS Policlinico S. Matteo Foundation, Section of Pneumology, Pavia, Italy
2. Department of Internal Medicine and Therapeutics, Pneumology Unit, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
3. Leiden University Medical Center, Pulmonology, Albinusdreef 2, Leiden, Netherlands
4. Department of Biology and Biotechnologies “L.Spallanzani”, University of Pavia, Pavia, Italy
5. Department of Respiratory Medicine, Hannover Medical School, Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Hannover, Germany