1. Cerrahpasa Medical Faculty, Department of General Surgery, Istanbul University, Istanbul, Turkey.
2. Medical Faculty, Department of General Surgery, Acibadem University, Istanbul, Turkey.
3. Clinical Laboratory, Koc University Hospital, Istanbul, Turkey.
4. Faculty of Medicine, Department of Medical Microbiology, Bahcesehir University, Istanbul, Turkey.
5. Istanbul Medical Faculty, Department of Biostatistics, Istanbul University, Istanbul, Turkey.