CSN1S1 and atrial fibrillation: Haldar et al. [14] in the CASA-AF study reported 26% of patients being free from recurrence at 1-year follow-up, whereas Ohtsuka et al. [15] reported 47% freedom at 2-year follow-up and van Laar et al. [16] reported 54% freedom at 1.7-year follow-up.