Vafaei, M., and B. Keikhaei-dehdazi. “Frequency of Red Blood Cell Alloimmunization in Sickle Cell Patients and Healthy Donors: The Influence of Racial and Antigenic Pattern Differences”. International Journal Of Community Medicine And Public Health, vol. 4, no. 7, June 2017, pp. 2226-9, doi:10.18203/2394-6040.ijcmph20172810.