Among them, MIR137, a micro-RNA, which is a regulator of neuronal development, showed the strongest association in schizophrenia (p-value = 1.6 × 10−11), and three more loci (CACNA1C, ANK3, and ITIH3-ITIH4) were significantly associated with both BD and schizophrenia [79]. This evidence concerns the gene ITIH4 and schizophrenia.