Cetin, Sirin, Meryem Cetin, Ebru Turhan, and Kenan Dolapcioglu. 2018. “Seroprevalence of Hepatitis B Surface Antigen and Associated Risk Factors Among Pregnant Women”. The Journal of Infection in Developing Countries 12 (10):904-9. https://doi.org/10.3855/jidc.10018.