Similarly, we found that higher transcription of CCL24 significantly differentiated MDD patients from BPD patients in both our discovery cohort (t = 7.247, d.f. = 57, p≤0.000001, d = 1.920) and validation cohort (t = 4.511, d.f. = 11.64, p≤0.001, d = 2.644). This evidence concerns the gene CCL24 and major depressive disorder.