Marks A, Maizels M, Mickelson J, Yerkes E, Herndon CA, Lane J, Ben-Ami T, Maizels E, Stoltz RS, Dixon S, Liu D. Effectiveness of the computer enhanced visual learning method in teaching the society for fetal urology hydronephrosis grading system for urology trainees. Journal of Pediatric Urology. 2011 Apr 1;7(2):113-117.