FKBP5 and Dravet syndrome: A further univariate analysis of covariance comparing DS group and healthy control subjects showed lower methylation levels in persistent DS group on FKBP5-12 CpG 1 (DS: 0.94 ± 2.00, control subjects: 0.47 ± 0.92; F = 5.41, P = 0.021).