1. Department of Clinical and Experimental Medicine, “Regional Referral Center for Rare Lung Diseases”, University - Hospital Policlinico “G. Rodolico- San Marco”, University of Catania, Catania, 95123 Catania, Italy.
2. Department of Clinical and Experimental Medicine, “Regional Referral Center for Rare Lung Diseases”, University - Hospital Policlinico “G. Rodolico- San Marco”, University of Catania, Catania, 95123 Catania, Italy
3. Internal Medicine Unit, Department of Clinical and Experimental Medicine, Division of Rheumatology, Cannizzaro Hospital, University of Catania, 95123 Catania, Italy
4. Department of Medical Surgical Sciences and Advanced Technologies “GF Ingrassia”, University -Hospital Policlinico “G. Rodolico-San Marco”, Unità Operativa Semplice Dipartimentale di Imaging Polmonare e Tecniche Radiologiche Avanzate (UOSD IPTRA), 95123 Catania, Italy