1 Department of Cardiovascular and Respiratory Sciences, Catholic University of the Sacred Heart, Largo Agostino Gemelli, 1, Rome, 00168, Italy.
2 Pathological Anatomy Laboratory, San Donato Hospital, Usl Toscana Sudest, Oncologic Department, Via Pietro Nenni 20/22, Arezzo, Italy.
3 Pulmonology and Respiratory Intensive Care Unit, San Donato Hospital, Cardio-toraco-neuro-vascular Department, Usl Toscana Sudest, Via Pietro Nenni 20/22, Arezzo, Italy. Electronic address: raffaele.scala@uslsudest.toscana.it.