Ameer, K.; Khan Burki, A. M.; Khan, R. A. S.; Ghani, U.; Yaqub, K. M.; Butt, N. T. Relation of Days on Ventilatory Support to Total Days of Illness in COVID-19 Patients. Pak Armed Forces Med J 2022, 72 (2), 560-63. https://doi.org/10.51253/pafmj.v72i2.5697.