TCF7L2 and myotonic dystrophy type 2: The linkof TCF7L2 (103894T ) and TCF7L2 (53341T ) alleles withincreased risk of DM2 was demonstrated in a number ofpopulations around the world, including Russia (Saxena etal., 2006; Cauchi et al., 2007; Potapov et al., 2010; Bondar’ etal., 2013; Avzaletdinova et al., 2016; Kaya et al., 2017; Melnikovaet al., 2020).