1. Department of Infectious Diseases and Clinical Microbiology, Erzurum Region Education and Research Hospital, Erzurum, Turkey.
2. Department of Microbiology, Ataturk University School of Medicine, Erzurum, Turkey.
3. Department of Internal Medicine, Ataturk University School of Medicine, Erzurum, Turkey.
4. Department of Pathology, Ataturk University School of Medicine, Erzurum, Turkey.
5. Department of Internal Medicine, Division of Gastroenterology, Mustafa Kemal University School of Medicine, Hatay, Turkey.