Reply to Egesta Lopci, Arturo Chiti, and Massimo Lazzeri's Letter to the Editor re: Laura Evangelista, Alberto Briganti, Stefano Fanti, et al. New Clinical Indications for 18F/11C-choline, New Tracers for Positron Emission Tomography and a Promising Hybrid Device for Prostate Cancer Staging: A Systematic Review of the Literature. Eur Urol 2016;70:161–75