NRAS and atrial fibrillation: Overall, at AF‰ ≥ 0.1, the absence of any NRAS type mutations was correlated with the absence of BRAF mutation RR3 = 2.333 (95% CI = [0.312, 17.452]), while their concomitant occurrence was characterized by OR = 2.579 (95% CI = [0.291, 22.884]) and RR2 = 2.155.