“…The incidence of IAS in Caucasians seems to be lower than in the Japanese population (Cappellani et al., 2020). However, the number of case reports regarding Caucasians has been increasing in recent years (Bresciani et al., 2011; Gullo et al., 2014; Michalopoulou Alevras et al., 2015; Lio et al., 2016; Ferreira et al., 2017; Bolayir et al., 2018; Cappellani et al., 2018; Veltroni et al., 2018; Alagüney et al., 2019; Moffa et al., 2019; Cambria et al., 2020; Okuroglu et al., 2020; Yukina et al., 2020). It is, however, difficult to estimate the actual incidence or conclude on a true increase in the disease incidence among Caucasians, because of a possible underestimation of the occurrence of the syndrome linked to a possible unawareness of the disease and its subsequent underdiagnosis and underreporting (Cappellani et al., 2020).…”