Genes in the top expression specificity decile for L4-RORB-LRRK1 were also enriched for common variant liability to attention-deficit/hyperactivity disorder (Figure S4 in Supplement 1 and Table S8 in Supplement 2) and bipolar disorder (Figure S5 in Supplement 1 and Table S9 in Supplement 2) at the Bonferroni-corrected p-value threshold in MAGMA and enriched for common variant liability to major depressive disorder at nominal significance (p < .05) in the SLDSR test (Figure S6 in Supplement 1 and Table S10 in Supplement 2). This evidence concerns the gene RORB and attention deficit-hyperactivity disorder.