TFB1M and schizophrenia: We then compared data from the 3 genes not used as reference genes and expressed as the geometric mean of SNCA, TFB1M and PPIA in BA 8, SNCA, PPIA and TFB1M in BA 9 and PPIA, GAPDH and SNCA in BA 44 from subjects with schizophrenia and controls.