Pierluigi Novellis1, Daniele Bonora Ottoni2. 1. Department of Surgery Science, Unit of Thoracic Surgery, Catholic University of Sacred Heart, A. Gemelli Hospital, L.go A. Gemelli n.8, Rome 00168, Italy. Electronic address: pierluigi.novellis@alice.it. 2. Department of General and Thoracic Surgery, Unit of Thoracic Surgery, Poliambulanza Foundation, Brescia, Italy.