1. University of Medicine and Pharmacy “Carol Davila” Bucharest, University Emergency Hospital, Bucharest, Romania.
2. I. Chirurgicka Klinika, University of Pavol Jozef Safarik, Kosice, Slovak Republic.
3. Section of Surgical Research, Department of Surgery, Medical University of Graz, Graz, Austria.
4. First Department of Surgery, University of Athens, Hippokration University Hospital, Athens, Greece.