Abbasi, Fahad, et al. “COVID VS. NON-COVID AGE-SPECIFIC MORTALITY IN ISLAMABAD: A COMPARATIVE CROSS-SECTIONAL SURVEY”. Journal of Ayub Medical College Abbottabad, vol. 33, no. 4, Oct. 2021, pp. 617-21, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/8508.