PPP1R1B and attention deficit-hyperactivity disorder: Analysis after excluding those participants from the ADHD GWAS-MA resulted in 202 genes of interest, highly overlapping with the 211 genes from the main ADHD–BMI meta-analysis results (182 overlapping genes), where the Dopamine-DARPP32 Feedback in cAMP Signaling pathway remained significantly associated with the phenotype through the canonical pathway enrichment analysis.