K. Saeed, A. Khan, A. Khanam, N. A. Lashari, H. Khan, and A. Khan, “Frequency of Hepatitis C Virus and Human Immunodeficiency Virus Coinfection among Intravenous Drug Abusers; Experience from A Single Rehabilitation Center”, PAFMJ, vol. 72, no. 4, pp. 1219–23, Aug. 2022.