OXTR and autism: Relatedly, many molecular genetic studies have so far focused on the oxytocin receptor (OXTR) gene, repeatedly showing that variations in the OXTR are significantly associated with measures of empathy (Chakrabarti et al., 2009; Rodrigues et al., 2009; Wu et al., 2012; Lucht et al., 2013; Uzefovsky et al., 2015), as well as with difficulties in empathy (Schneiderman et al., 2013) and with autism (Chakrabarti et al., 2009) and ToM (Wu and Su, 2014).