S. M. Malik, S. Sheraz, H. Ullah, R. A. Hassan, and A. Ara, “The Role of Early Warning System in Predicting Severe Maternal MorbidityTaking Intensive Care Unit Admission as the Reference Standard”, Pak Armed Forces Med J, vol. 73, no. 5, pp. 1334–1337, Oct. 2023, doi: 10.51253/pafmj.v73i5.7385.