Marcello Migliore1, Semih Halezeroglu2, Michael R Mueller3. 1. Section of Thoracic Surgery, Department of Surgery & Medical Specialties, University of Catania, Italy. 2. Department of Thoracic Surgery, Faculty of Medicine, Acibadem University, Istanbul, Turkey. 3. Department of Thoracic Surgery, Otto Wagner Hospital, University of Vienna, Austria.