1. Department of Surgery Moritz Kaposi General Hospital Kaposvár Hungary
2. Doctoral School of Clinical Medicine University of Debrecen Debrecen Hungary
3. Department of General Surgery University of DebrecenKenézy Gyula Teaching Hospital Debrecen Hungary
4. Department of Surgery Borsod‐Abaúj‐Zemplén County Hospital and University Teaching Hospital Miskolc Hungary
5. Faculty of Public Health University of Debrecen Debrecen Hungary
6. Institute of Surgery University of Debrecen Debrecen Hungary