FOLH1 and neoplasm: After 24 h, 124I-scFvD2B was cleared from blood and kidneys, while the uptake in the PSMA-positive tumours remained still evident and around 4 times higher than in the PSMA-negative tumours (PSMA positive vs PSMA negative tumors %ID/g: p = 0.0176) (Fig. 3b).