I. . Khider Ibrahim, . . . . . . . . . . . . . . S. . M.S.Osman, and G. . Allah Modawe, “Serum Interleukin-6 Levels in Rheumatoid Arthritis Patients with and without Anemia in Khartoum State, Sudan”, oiujas , vol. 21, no. 2, pp. 8–19, Jun. 2025.