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Frequency of anti-SSA/Ro, anti-SSB/La and anti-U1RNP positivity in 745 American College of Rheumatology classification criteria-confirmed cases of systemic lupus erythematosus in which all three antibodies were tested
| Anti-SSA/Ro | Anti-SSB/La | Anti-U1 RNP | Percent |
|---|---|---|---|
| + | + | + | 8.1 |
| + | + | − | 9.7 |
| + | − | + | 9.8 |
| + | − | − | 13.0 |
| − | + | + | 0.7 |
| − | + | − | 1.5 |
| − | − | + | 20.5 |
| − | − | − | 36.8 |
