GABRB2 and psychotic disorder: Similarly, in Figure 6, the expression levels of all four GABRB2 isoforms in the high antipsychotics dosage SCZ patient subgroup, but not in the low dosage subgroup, significantly departed from the controls (p = 0.023, 0.047, 0.011 and 0.004 for the β2S, β2S1, β2S2 and β2L isoforms, respectively), in accord with the effects of GABRB2 being associated with the psychosis endophenotype.