We found 11 HEIDI(+) markers reaching significance threshold (Table S3), corresponding to eight different proteins, which included ESAM (PSMR for SCZ = 1.57 × 10−7), GPNMB (PSMR = 3.01 × 10−6 for PD), FLRT3 (PSMR for BP = 1.06 × 10−5), and MANBA (PSMR for ADHD = 4.62 × 10−5). This evidence concerns the gene FLRT3 and attention deficit-hyperactivity disorder.