DCX and major depressive disorder: Finally, having discovered that a high number of TW0 CC3+, TW0 CC3/BrdU+, and a low number of TW4 DCX+ and ΔTW4-TW0 DCX+ cells, were significantly predictive of IFN-α–induced depression, we subsequently investigated which model (containing those markers as variables) could be defined as the best one in terms of accuracy when predicting IFN-α–induced depression.