THAP1 and Dystonia: In other THAP1 screening series, this variant was reported in 3/455 subjects with primary dystonia and 1/185 controls (Groen et al. 2010), 1/567 dystonia subjects and 1/365 controls (Lohmann et al. 2012), 0/109 dystonia subjects and 1/185 controls (Groen et al. 2011).