All ratios of gene expression between individual receptors (D1:D2, D1:D3, D1:D4, etc.)differed significantly between the schizophrenia and control groups, except for D1:D4, D3:5-HT1A, D3:5-HT2A and 5-HT1A:5-HT2A (Table 5 and Figure 2); p < 0.001 for all comparisons. Here, HTR2A is linked to schizophrenia.