1. Sakarya University Educating and Research Hospital, Department of General Surgery, Serdivan, Sakarya, Turkey
2. Sakarya University, Faculty of Medicine, Department of General Surgery, Serdivan, Sakarya, Turkey
3. Sakarya University Educating and Research Hospital, Department of Gastroenterological Surgery, Serdivan, Sakarya, Turkey
4. Sakarya University, Faculty of Medicine, Department of Biostatistics, Serdivan, Sakarya, Turkey