Rheumatoid arthritis disease activity measures: American College of Rheumatology recommendations for use in clinical practice.
Anderson J, Caplan L, Yazdany J, Robbins ML, Neogi T, Michaud K, Saag KG, O'Dell JR, Kazi S. Rheumatoid arthritis disease activity measures: American College of Rheumatology recommendations for use in clinical practice. Arthritis Care Res (Hoboken). 2012 May; 64(5):640-7.