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. mfm [Internet]. 2024 Apr. 13 [cited 2025 Dec. 26];32(1). Available from: https://medicalforummonthly.com/index.php/mfm/article/view/2115