“Evaluation of Peripheral Oxygen Saturation after Wearing Different Face Masks and Related Anxiety in Healthcare Workers Amid COVID-19 Pandemic at A Tertiary Care Facility in Province of Sindh” (2021) Medical Forum Monthly, 32(1). Available at: http://medicalforummonthly.com/index.php/mfm/article/view/2115 (Accessed: 15 April 2026).