SNP rs2323266, located 14.01 Mb from marker D13S162 and close to the protocadherin 20 (PCDH20) gene in this region, has been previously connected to positive symptom dimension in a genome-wide association study (GWAS) of schizophrenia (P = 3 × 10−6)23. This evidence concerns the gene PCDH20 and schizophrenia.