Mahmoudy, M. E., Shouman, W. M., Mansor, A. M., Ibrahim, D. A. (2022). 'Outcome and Survival of Severe to Critical COVID-19 Patients Admitted at Zagazig University Hospitals', The Egyptian Journal of Hospital Medicine, 88(1), pp. 2304-2310. doi: 10.21608/ejhm.2022.235953