SERPINB2 and neoplasm: As shown in Figure 3C, 6 weeks after therapy, 213Bi-PAI2 significantly inhibited the growth of PC3 tumours, as evidenced by tumour volumes of 106±20 mm3 in 6.0 mCi kg−1-treated group and 175±38 mm3 in 3.0 mCi kg−1-treated group as compared with controls (PAI2 alone) that measured 474±50 mm3 (78 and 63% reductions, P<0.001).