Chatzikyriakidou et al. [70] conducted a study on the correlation between the TNFR1 gene polymorphism 36A/G, the TNF-α gene polymorphism −857C/T, −308G/A, −238G/A, and 489G/A, and the therapeutic effect in 27 RA patients treated with IFX. The gene discussed is TNF; the disease is rheumatoid arthritis.