FOLH1 and neoplasm: The mean tumor volume of PSMA Th1- and Th2-selective epitope combined vaccinated mice (625 ± 104 mm3) was significantly greater than that observed in mice receiving the Th1-selective vaccine (p = 0.0002) but not significantly different than the Th2 vaccine (p = 0.6468) or the adjuvant control (p = 0.3683; Fig. 2B).