January 12, 2011 — Up to 13% of healthy people test positive for antinuclear antibodies (ANA), which are associated with autoimmune disorders such as rheumatoid arthritis, Sjögren's syndrome, or ...

In Brazilian patients with a variety of known ARDs (N=138; 87 with systemic lupus erythematosus, 45 with systemic sclerosis, 11 with Sjögren syndrome, and 10 with inflammatory myopathy) and healthy ...