IL6 and rheumatoid arthritis: IL-6 is associated with chronic inflammatory diseases such as coronary heart disease, Crohn’s disease, rheumatoid arthritis (RA), systemic-onset juvenile chronic arthritis (JCA), osteoporosis, psoriasis, multiple myeloma (MM), Castleman's disease, prostate carcinoma and systemic sclerosis [7], [8], [9], [10].