BD has shown a substantial genetic correlation of around 68% with schizophrenia and, interestingly, SERPING1 was among the genome-wide significant risk loci for schizophrenia identified in the largest GWAS of schizophrenia to date (rs9420, p = 2.24×10−9) [12, 48]. The gene discussed is SERPING1; the disease is schizophrenia.