Hamza Abdallh****4M. Z. A. S. W. I. E. R. Y. E. F., “SEROFREQUENCY OF HEPATITIS D VIRUS AMONG HEPATITIS B VIRUS INFECTED PATIENTS ATTENDING TO TALODI HOSPITAL, SOUTH KORDOFAN STATE, SUDAN.”, JBPR, vol. 4, no. 1, Feb. 2015.