EL-SadigS. M., MohamedN. S., AhmedE. S., AlayeibM. A., TahirL. H., EdrisA. M. M., AliY., SiddigE. E., and AhmedA. “Obstacles Faced by Healthcare Providers During COVID-19 Pandemic in Sudan”. The Journal of Infection in Developing Countries, Vol. 15, no. 11, Nov. 2021, pp. 1615-7, doi:10.3855/jidc.14726.