1 Department of Internal Medicine, Hacettepe University School of Medicine, Ankara 06230, Turkey; Hacettepe University Vaccine Institute, Ankara, Turkey.
2 Department of Gastroenterology, Turkish Republic Ministry of Health, Istanbul Provincial Health Directorate, University of Health Sciences Istanbul Umraniye Training and Research Hospital, Istanbul, Turkey.
3 Department of Infectious Diseases and Clinical Microbiology, Hacettepe University School of Medicine, Ankara 06230, Turkey; Hacettepe University Vaccine Institute, Ankara, Turkey.
4 Department of Infectious Diseases and Clinical Microbiology, Hacettepe University School of Medicine, Ankara 06230, Turkey; Hacettepe University Vaccine Institute, Ankara, Turkey. Electronic address: makova@hacettepe.edu.tr.