1. Department of Surgery No.2, Kharkiv National Medical University, Nezalezhnosti Avenue, 61022 Kharkiv, Ukraine
2. Institute General and Emergency Surgery Named after V.T. Zaitcev of the National Academy of Medical Sciences of Ukraine, Balakireva Entry, 61103 Kharkiv, Ukraine
3. Department of Surgery No.1, Kharkiv National Medical University, Balakireva Entry, 61103 Kharkiv, Ukraine
4. Department of Surgery, Macerata Hospital, Santa Lucia Street, 62100 Macerata, Italy