Ahmed, S.I.Y. 2020. The Controversy on the Role of ACE2 Receptor in COVID-19 Infection: The Protective Shift toward the ACE2 Axis. Sudan Journal of Medical Sciences (SJMS). 15, 4 (Dec. 2020), 378–382. DOI:https://doi.org/10.18502/sjms.v15i4.8160.