1. Department of Plastic Surgery Østfold Hospital Trust Grålum Norway
2. Department of Pathology Østfold Hospital Trust Grålum Norway
3. Department of Gastrointestinal Surgery Østfold Hospital Trust Grålum Norway
4. Intervention Centre Oslo University Hospital ‐ Rikshospitalet Oslo Norway
5. Institute for Clinical Medicine, Medical Faculty University of Oslo Oslo Norway
6. Department of Faculty Surgery No 2 I.M. Sechenov First Moscow State Medical University Moscow Russia
7. Department of Surgery No 1 Yerevan State Medical University After M.Heratsi Yerevan Armenia