1. Department of General Surgery, School of Medicine, Ege University, Bornova, Izmir, Turkey;
2. Department of General Surgery, Zubeyde Hanim Practice and Research Center, Baskent University, Izmir, Turkey;
3. Department of Biochemistry, School of Medicine, Adnan Menderes University, Aydın, Turkey;
4. Department of Biostatistics, School of Medicine, Ege University, Bornova, Izmir, Turkey;
5. Department of Pathology, School of Medicine, Ege University, Bornova, Izmir, Turkey;
6. Department of Gastroenterology, School of Medicine, Ege University, Bornova, Izmir, Turkey