Mirza, W., A. Javed, M. Siddique, H. Ghauri, M. A. Azad, and S. Ahmed. “A SURVEY REGARDING PROPHYLACTIC USE OF HYDROXYCHLOROQUINE / CHLOROQUINEFOR COVID-19 AMONG HEALTHCARE WORKERS OF PAKISTAN”. PAFMJ, Vol. 70, no. 1, Aug. 2020, pp. S375-80, https://www.pafmj.org/index.php/PAFMJ/article/view/4937.