1. Department of Surgery Klaipeda University Hospital Klaipeda Lithuania
2. Faculty of Medicine Institute of Clinical Medicine Vilnius University Vilnius Lithuania
3. Faculty of Health Sciences Health Research and Innovation Centre Klaipeda University Klaipeda Lithuania
4. Respublican Vilnius University Hospital Vilnius Lithuania
5. Departament of General and Abdominal Surgery and Oncology National Cancer Institute Vilnius Lithuania
6. Faculty of Health Care University of Applied Sciences Vilnius Lithuania