Azizmohammad Looha, Mehdi, et al. “Trend of COVID-19 Hospital Cases Fatality Rate in Iran: A Multicenter Study of 5318 Hospitalized COVID-19 Patients from March 2020 to March 2021”. Student Research in Translational Medicine, vol. 5, Dec. 2023, doi:10.22037/srtm.v5.41994.