1. Department of Thoracic Surgery, Harefield Hospital, Guy’s and St. Thomas’ NHS Foundation Trust , London, UK
2. Department of Thoracic Surgery, Athens Naval Hospital , Athens, Greece
3. Thoracic Surgery Department, University Hospital Puerta de Hierro-Majadahonda, Majadahonda, University of Salamanca. Biomedical Institute of Salamanca (IBSAL) , Salamanca, Spain
4. Department of Thoracic Surgery, IRCCS Azienda Ospedaliera Universitaria di Bologna , Bologna, Italy
5. Department of Thoracic Surgery, Marmara University School of Medicine , Istanbul, Turkey