<qa>  What is the main component of treatment for most rheumatic autoimmune diseases?For most rheumatic autoimmune diseases, treatment has two components: induction of remission and maintenance to prevent relapse. After screening week -3 to 0, patients enter into a 3 week run-in period during which no glucocorticoid GC treatment is allowed. At week 0, if persistent synovitis is confirmed patients will enter the induction phase. During the induction phase all patients will receive TCZ and MTX from week 0 to week 24. After week 24, all patients will receive MTX. 