Static and Dynamic Ultrasound Imaging to Visualize the Bladder, Bladder Neck, Urethra, and Pelvic Floor in Children with Daytime Incontinence - Schroeder, Rogier; de Mooij, Keetje; Groen, Luitzen; Dik, Pieter; Kuijper, Caroline; Klijn, Aart; de Jong, Tom (Frontiers in Pediatrics, 2017)