1. Department of Surgical Oncology, SBU Samsun City Training and Research Hospital
2. Department of Surgical Oncology, SBU Adana City Training and Research Hospital
3. Department of General Surgery, Acibadem Eskisehir Hospital,
4. UNIVERSITY OF HEALTH SCIENCES, ANKARA DIŞKAPI YILDIRIM BEYAZIT HEALTH RESEARCH CENTER, DEPARTMENT OF INTERNAL MEDICINE, DEPARTMENT OF INTERNAL MEDICINE, GASTROENTEROLOGY
5. Afyonkarahisar State Hospital
6. ESKISEHIR OSMANGAZI UNIVERSITY, SCHOOL OF MEDICINE, DEPARTMENT OF SURGICAL MEDICAL SCIENCES, DEPARTMENT OF GENERAL SURGERY, GASTROENTEROLOGY SURGERY (MEDICINE)
7. ESKISEHIR OSMANGAZI UNIVERSITY, SCHOOL OF MEDICINE, DEPARTMENT OF SURGICAL MEDICAL SCIENCES, DEPARTMENT OF GENERAL SURGERY, SURGICAL ONCOLOGY (MEDICINE)
8. ESKISEHIR OSMANGAZI UNIVERSITY, SCHOOL OF MEDICINE, DEPARTMENT OF INTERNAL MEDICINE, DEPARTMENT OF INTERNAL MEDICINE, GASTROENTEROLOGY
9. ISTANBUL AYDIN UNIVERSITY, SCHOOL OF MEDICINE