Reply to Masaki Shiota and Akira Yokomizo's Letter to the Editor re: Robert J. van Soest, Ellen S. de Morrée, Charlotte F. Kweldam, et al. Targeting the Androgen Receptor Confers In Vivo Cross-resistance Between Enzalutamide and Docetaxel, But Not Cabazitaxel, in Castration-resistant Prostate Cancer. Eur Urol 2015;67:981–5