STRADA and epilepsy: In all Mennonite individuals, PS is caused by a homozygous founder deletion spanning exons 9–13 of the STE20-related kinase adaptor alpha (STRADA) gene (17q23.3) although additional non-Mennonite (non-founder) STRADA variants associated with PS have been reported e.g., a consanguineous Asian pedigree, c.842dupA, p.D281fs (Bi et al., 2016), and a consanguineous Turkish pedigree, c.891dupC; p.C298Lfs* (Evers et al., 2017), demonstrating that STRADA is relevant outside of the Mennonite community as an epilepsy and ME gene.