AHMAD, Aziz. Frequency of HBV Surface Antigen and Anti - HCV in healthy voluntary blood donars in Swat district. Journal of Postgraduate Medical Institute, [S. l.], v. 20, n. 2, 2011. Disponível em: http://www.jpmi.org.pk/index.php/jpmi/article/view/1025. Acesso em: 5 dec. 2025.