1. Department of General Surgery, Ankara Training and Research Hospital, University of Health Science, Ankara, 06230, Turkey
2. Department of Microbiology, Etlik City Hospital, University of Health Science, Ankara, 06170, Turkey
3. Department of General Surgery, Etlik City Hospital, University of Health Science, Ankara, 06170, Turkey
4. Department of General Surgery, Ankara Hospital, Lokman Hekim University, Ankara, 06510, Turkey