Variants in THRB are linked to various phenotypes, including cognitive function (Davies et al., 2015), asthma (Demenais et al., 2017), telomere length (Allaire et al., 2023), myopia (Pickrell et al., 2016), and atrial fibrillation (Sakaue et al., 2021). Here, THRB is linked to atrial fibrillation.