FUT2 and schizophrenia: The index SNVs rs681343 (PLACO P = 1.36 × 10−12 for PUD-schizophrenia) and rs601338 (PLACO P = 5.07 × 10−11 for PUD-ADHD) at 22q13.2 were in high LD (r2 = 0.996) and had almost identical eQTL regulation information (eTable 7 in Supplement 1), regulating the expression of FUT2 (OMIM 182100).