FGF23 and atrial fibrillation: The vast majority of the clinical studies have correlated high plasma levels of FGF-23 with AF (Seiler et al., 2011; Alonso et al., 2014; Mathew et al., 2014; Masson et al., 2015; Panwar et al., 2015; Ter Maaten et al., 2018; Chua et al., 2019; Dong et al., 2019).