1. Pediatric Pulmonology and Cystic Fibrosis Unit, 3rd Pediatric Department, Aristotle University of Thessaloniki, Hippokration General Hospital of Thessaloniki, Konstantinoupoleos Str. 49, 54642 Thessaloniki, Greece
2. Pediatric Immunology and Rheumatology Referral Center, 1st Department of Pediatrics, Aristotle University of Thessaloniki, Hippokration General Hospital of Thessaloniki, Konstantinoupoleos Str. 49, 54642 Thessaloniki, Greece
3. School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece