Reply to Apul Goel, Swarnendu Mandal and Sachin B. Patil’s Letter to the Editor Re: Gianluca Giannarini, Thomas M. Kessler, Frédéric D. Birkhäuser, George N. Thalmann, Urs E. Studer. Antegrade Perfusion With Bacillus Calmette-Guerin in Patients With Non–Muscle-Invasive Urothelial Carcinoma of the Upper Urinary Tract: Who May Benefit? Eur Urol 2011;60:955-60