TARDBP and Parkinson disease: To date, 3,647 PD patients of Caucasian origin have been screened for TARDBP mutations by eight distinct genetic studies, including the present report (Kabashi et al., 2009; Quadri et al., 2011; Ticozzi et al., 2011; Cannas et al., 2013; Rayaprolu et al., 2013; van Blitterswijk et al., 2013; Gagliardi et al., 2018).