1 Division of Thoracic Surgery, Maria Cecilia Hospital (RA) and Alma Mater Studiorum, University of Bologna, Via Massarenti 9, Bologna 40138, Italy. Electronic address: sandro.mattioli@unibo.it.
2 Division of Thoracic Surgery, Maria Cecilia Hospital (RA) and Alma Mater Studiorum, University of Bologna, Via Massarenti 9, Bologna 40138, Italy.