Reply to Luca Boeri and Emanuele Montanari`s Letter to the Editor re: Guido Giusti, Silvia Proietti, Moises E. Rodríguez-Socarrás, et al. Simultaneous Bilateral Endoscopic Surgery (SBES) for Patients with Bilateral Upper Tract Urolithiasis: Technique and Outcomes. Eur Urol 2018;74:810-5 (European Urology)

The Concise Oxford Thesaurus defines a pilot project or study as an `experimental, exploratory, test, preliminary, trial or try out` investigation [1]. The purpose of a pilot study is to perform a `...test of the methods and procedures to be used on a larger scale` if the pilot study demonstrates that the methods and procedures work [2]. We appreciate the comments by Boeri and Montanari and their compliments regarding our study. We wish to respond to their letter by stating that we agree with their premise: ours is indeed a pilot study, a small-scale study performed with the intent of demonstrating feasibility so that the simultaneous bilateral endoscopic surgery (SBES) technique can be understood by others.