Wafa Ibrahim Elhag ***3N. O. M. N. A. I. **2,. (2017). SEROFREQUENCY OF HEPATITIS D VIRUS AMONG HEPATITIS B INFECTED PATIENTS, KHARTOUM STATE, SUDAN. Journal of Biomedical and Pharmaceutical Research, 4(5). Retrieved from http://jbpr.in/index.php/jbpr/article/view/226