1. Department of General Surgery, Bingol State Hospital, Bingol, Turkey
2. Department of General Surgery, Istanbul Kartal Dr Lutfi Kirdar City Hospital, Istanbul, Turkey
3. Department of General Surgery, Cerrahpasa School of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
4. Department of Immunology, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
5. Department of Pathology, Cerrahpasa School of Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
6. Department of General Surgery, Afyon Bolvadin State Hospital, Afyon, Turkey
7. Department of General Surgery, Kars Sarikamis State Hospital, Kars, Turkey