E. E. Abouelenein, M. Elawdy, D.-E. Taha, Y. Osman, B. Ali-El Dein, and A. Mosbah, “Incidence and Predictors of Secondary Upper Tract Urothelial Cancer in Patients with High-Risk Non-Muscle Invasive Urinary Bladder Cancer and its Impact on Imaging Surveillance: A Retrospective Analysis with 1501 Patients”, Soc Int Urol J, vol. 2, no. 3, pp. 151-157, May 2021.