Hamdan H. Al-Hazmi, Fahad A. Al-Yami, Raed M. Almannie, Jawaher S. Al-Emran, Mashael A. Hussain, Rana F. Alhumaemydi, Sara S. Aljebrin, Aljohara K. Aldhaish, & Mahmoud S. Trbay. (2018). Age of Initiation and the Factors Associated with Toilet Training in Healthy Saudi Children. Journal of King Abdulaziz University: Medical Sciences, 25(1), 15–22. https://doi.org/10.4197/Med.25-1.3