1. Regional Referral Centre for Rare Lung Disease, Department of Clinical and Experimental Medicine, University Hospital “Policlinico-San Marco”, University of Catania, 95123 Catania, Italy
2. Radiology Unit I, Department of Medical Surgical Sciences and Advanced Technologies “GF Ingrassia”, University Hospital “Policlinico-San Marco”, University of Catania, 95123 Catania, Italy