KURÇER, Mehmet Ali, and Erkan PEHLİVAN. “Hepatitis B Seroprevalance and Risk Factors in Urban Areas of Malatya”. Turkish Journal of Gastroenterology, vol. 13, no. 1, Jan. 2002, pp. 1-5, https://www.turkjgastroenterol.org/index.php/tjg/article/view/1177.