Department of Gastroenterology, Gazi University, School of Medicine, Ankara
2.Departments of Clinical Bacteriology and Infectious Disease, Gaziosmanpafla University, School of Medicine, Tokat
3.Departments of Microbiology,Gaziosmanpafla University, School of Medicine, Tokat
4.Departments of Public Health,Gaziosmanpaşa University, School of Medicine, Tokat
5.Departments of Biochemistry, Gaziosmanpaşa University, School of Medicine, Tokat