Michał Wysocki 1, Maciej Walędziak 2, Monila Proczko-Stepaniak 3, Michał Pędziwiatr 1, Jacek Szeliga 4, Piotr Major 1, ⁎
1 2nd Department of General Surgery, Jagiellonian University Medical College, Krakow, Poland
2 Department of General, Oncological, Metabolic and Thoracic Surgery, Military Institute of Medicine, Warsaw, Poland
3 Department of General, Endocrine and Transplant Surgery, Medical University of Gdansk, Gdansk, Poland
4 Department of General, Gastroenterological and Oncological Surgery, Collegium Medicum Nicolaus Copernicus University, Torun, Poland