KARAEREN, Zihni, Ayşegül AKBAY, Selda DEMİRTAŞ, İmge ERGÜDER, and Ali ÖZDEN. 2002. “A Reference Interval Study of Urinary Lactulose Excretion: A Useful Test of Intestinal Permeability in Adults”. Turkish Journal of Gastroenterology 13 (1):35-39. https://turkjgastroenterol.org/index.php/tjg/article/view/1183.