SLC29A1 and schizophrenia: Significant positive associations were observed between ENT1 and ENT2 mRNA expression (Spearman’s r = 0.891; p < 0.0001; Figure 6A), ENT1 and NT5E mRNA expression (Spearman’s r = 0.592; p = 0.001; Figure 6B), and ENT2 and NT5E mRNA expression (Spearman’s r = 0.570; p = 0.002; Figure 6C) across all schizophrenia and subjects.