Chathongyot, N., C. Thongkhruea, S. Borwornpadungkitti, and C. Predanon. “Effect of Gum Chewing to Reduce Postoperative Ileus Following Anatrophic Nephrolithotomy or Nephrectomy”. Journal of Health Science of Thailand, vol. 19, no. 3, Jan. 2018, pp. 457-66, https://thaidj.org/index.php/JHS/article/view/1438.