SCHZ consistently showed greater within- than between-group similarity both with BPD and ADHD groups, whilst both BPD and ADHD showed comparable within- and between-group similarities, with few exceptions (within-group similarity of BPD was significantly different than BPD-ADHD similarity for SERT- and VAChT-enriched networks; within-group similarity of ADHD was significantly different than between-group similarity with BPD and SCHZ for the SERT-enriched network, and with SCHZ for the mGluR5-enriched network). This evidence concerns the gene SLC18A3 and attention deficit-hyperactivity disorder.