KCNQ1 and Borderline personality disorder: This study, using the 27K bead chip, identified significantly higher methylation of APBA3 (cg20366831), KCNQ1 (cg17820828), MCF2 (cg21557231), and NINJ2 (cg20781967) in BPD compared to HC, and confirmed these findings with pyrosequencing [27].