Akhtar, Mohammad Irfan, Ali Sarfraz Siddiqui, and Muhammad Faisal Khan. 2019. “Supplemental Oxygen Administration Practices in Post Anesthesia Care Unit of a Tertiary Care Hospital: An Observational Prospective Study”. Anaesthesia, Pain & Intensive Care 22 (2), 174-79. https://apicareonline.com/index.php/APIC/article/view/44.