1. Department of Surgery, Klaipeda University Hospital, Klaipeda, Lithuania
2. Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
3. Health Research and Innovation Science Center, Faculty of Health Sciences, Klaipeda University, Klaipeda, Lithuania
4. Department of Surgical Oncology, National Cancer Institute, Vilnius, Lithuania
5. Klaipeda University Hospital, Klaipeda, Lithuania