Reply to Thomas Zilli, Gilles Créhange and Olivier Chapet's Letter to the Editor re: Pascal Rischmann, Albert Gelet, Benjamin Riche, et al. Focal High Intensity Focused Ultrasound of Unilateral Localized Prostate Cancer: A Prospective Multicentric Hemiablation Study of 111 Patients. Eur Urol 2017;71:267–73