DHX9 and systemic lupus erythematosus: Anti-RHA was found in 23% (14/62) in this cohort of Mexican patients, a prevalence that was greater than that of anti-Sm (13%) (Table 1) and much higher than that of anti-RHA (6%) reported in American patients [4], whereas the prevalence of other specificities did not seem to be different from other reports in SLE.