@article{amar ibrahim omer yahia2022of,
  title={Use of convalescent plasma in the treatment of critically ill COVID-19 patients: a study protocol},
  author={amar ibrahim omer yahia,abubakar mohammed jibo,ahmed yahia alameer,elhadi ibrahim miskeen,hatim khalifa karar},
  journal={Signa Vitae},
  volume={18},
  number={2},
  pages={31--40},
  doi = {10.22514/sv.2021.214},
  year={2022}
}