1 Department of Morphology, Experimental Medicine and Surgery, Section of Chirurgia 1, Section of Anatomic Pathology, University of Ferrara, Ferrara, Italy.
2 Department of Respiratory Diseases, Section of Anatomic Pathology, University of Ferrara, Ferrara, Italy.
3 Department of Experimental and Diagnostic Medicine, Section of Anatomic Pathology, University of Ferrara, Ferrara, Italy.