R. Ahmed Ibrahim, فراس, F. Al-Tae, and ربى, “Interleukin – 6 Serum Level and Single Nucleotide Gene -174 G/C promoter Polymorphism in Patients with Rheumatoid Arthritis / Iraq”, Ann. coll. Med. Mosul , vol. 43, no. 2, pp. 164–175, Jun. 2025.