1. Department of Basic Medical Sciences, Neuroscience and Sense Organs, Section of Respiratory Disease, University “Aldo Moro” of Bari, Bari, Italy
2. University Hospital “Sv. Ivan Rilski”, Urvich St., 13, 1612 Sofia, Bulgaria
3. Department of Medical and Surgical Sciences, University of Foggia, Italy
4. Institute of Respiratory Disease, Policlinico Riuniti of Foggia, Foggia, Italy
5. Thoracic Surgery Section, Department of Medical and Surgical Sciences, University of Foggia, Italy
6. Department of Translational Medicine-Piemonte Orientale University, Italy