Reply to Gianluca Giannarini, Nazareno Suardi and Alberto Briganti's Letter to the Editor re: Prasanna Sooriakumaran, Abhishek Srivastava, Shahrokh F. Shariat, et al. A Multinational, Multi-institutional Study Comparing Positive Surgical Margin Rates Among 22 393 Open, Laparoscopic, and Robot-assisted Radical Prostatectomy Patients. Eur Urol. In press. http://dx.doi.org/10.1016/j.eururo.2013.11.018