CRP and rheumatoid arthritis: CPA: cyclophosphamidel; DEX: dexamethasone; F: female; M: male; mPSL: methylprednisolone; MTX: methotrexate; PSL: prednisolone; RA: rheumatoid arthritis; RTX: rituximab; “+” indicates presence; “-” indicates absence; NA: data not available or not reported in the original article; WNL: within normal limits; CRP: C-reactive protein; RF: rheumatoid factor