Kalbit, R.H., Lorenzo, E.I.S., Bardelosa, J.G.R. and Reyes, E.L. 2020. Design and Validation of a Non-biological 3D Printed Pelvocalyceal System (RIRS Box) for Simulation-based Training of Flexible Ureteroscopy: A Stage 2A Surgical Innovation Study. Philippine Journal of Urology. 30, 1 (Sep. 2020), 49-55.