Masood, Sadia, Unzela Ghulam, Zahra Rahmatullah, and Shayana Rukhsar Hashmani. 2023. “MASKNE - Prevalence and Association of Causative Factors During Covid-19 Pandemic at a Tertiary Care Hospital of Karachi”. Journal of the Pakistan Medical Association 73 (6):1221-25. https://doi.org/10.47391/JPMA.6734.