1. From the Department of Infectious Diseases and Clinical Microbiology, Bozok Universitesi, Yozgat, Turkey
2. From the Department of Medical Biochemistry, Bozok Universitesi, Yozgat, Turkey
3. From the Hepatitis A immunity in Yozgat, Turkey
4. From the Department of Medical Pharmacology, Hacettepe Universitesi, Ankara, Turkey