Effects of mirabegron on human atrial tone in the absence and presence of blockade of β1‐adrenoceptor antagonism (CGP 20,712), β3‐adrenoceptor antagonism (L 748,337), or combined agonism. ns: not statistically significant; *P < 0.05 as compared to data in the absence of CGP 20,712. Reproduced with permission from (Mo et al., 2017)