ISAM M ELKHIDIR, H. D. M. E. Y. K. A. E. M. N. W. A. E. SERO-PREVALENCE OF HEPATITIS B VIRUS (HBsAg) AND HEPATITIS C VIRUS (Anti-HCV) AMONG HIV-INFECTED IN SUDAN. Journal of Biomedical and Pharmaceutical Research, v. 2, n. 6, 30 Dec. 2013.