K. Amr, R. El-Awady, and H. Raslan, “Assessment of the −174G/C (rs1800795) and −572G/C (rs1800796) Interleukin 6 Gene Polymorphisms in Egyptian Patients with Rheumatoid Arthritis”, Open Access Maced J Med Sci, vol. 4, no. 4, pp. 574–577, Oct. 2016.