1 Department of General, Oncological and Vascular Surgery, 5th Military Hospital in Kraków, Kraków, Poland; Department of Surgery, Faculty of Medicine and Health Sciences, Andrzej Frycz Modrzewski Krakow University, Kraków, Poland; Scientific Editorial Office, The Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland. wwysocki@mp.pl