A. A. . Hassan, M. . Abdalmajed, T. B. . Mohamadeen, and N. B. . Mohamadeen, “Sero-Prevalence of Syphilis Among Blood Donors in Port Sudan city, Sudan, 2016”, ABC res. alert, vol. 10, no. 2, pp. 60–70, Jul. 2022, doi: 10.18034/ra.v10i2.613.