Ahmed Ibrahim, Ruba, and Firas Al-Tae. 2021. “Interleukin – 6 Serum Level and Single Nucleotide Gene -174 G/C Promoter Polymorphism in Patients With Rheumatoid Arthritis / Iraq”. Annals of the College of Medicine, Mosul 43 (2):164-75. https://doi.org/10.33899/mmed.2021.131144.1108.