Figure 2.

Evolution of undifferentiated connective disease to defined connective tissue diseases. MCTD, mixed connective tissue disease; RA, rheumatoid arthritis; SLE, systemic lupus erythematosus; UCTD, undifferentiated connective tissue disease.

Zold et al. Arthritis Research & Therapy 2008 10:R123   doi:10.1186/ar2533
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