ETV1 and prostate intraepithelial neoplasia: Regardless, ETV1;Pb-Cre4;Smad4f/f compound mice did not develop prostate adenocarcinomas and the degree of high-grade PIN formation was similar to ETV1 and Pb-Cre4;Smad4f/f mice (Fig. 6b and Supplementary Fig. S6).