Janta I, Naredo E, Martinez-Estupinan L et al. . Patient self-assessment and physician's assessment of rheumatoid arthritis activity: which is more realistic in remission status? A comparison with ultrasonography. Rheumatology (Oxford) 2013;52:2243–50. 10.1093/rheumatology/ket297
A simplified disease activity index for rheumatoid arthritis for use in clinical practice.