2 Cardiothoracic Department, Respiratory and Critical Care Unit Bari Policlinico University Hospital, Italy; Section of Respiratory Diseases, Department of Basic Medical Science Neuroscience and Sense Organs, University of Bari "Aldo Moro", Italy.
4 Department of Surgical, Oncological and Oral Science (Di.Chir.On.S.), University of Palermo, Italy.
5 Fondazione Istituto "G. Giglio" Cefalù, Palermo, Italy; Department of Surgical, Oncological and Oral Science (Di.Chir.On.S.), University of Palermo, Italy.