TÜRKAY, Cansel, et al. “The Effect of Helicobacter Pylori Eradication on Symptoms and Gastric Emptying in Patients With Nonulcer Dyspepsia”. Turkish Journal of Gastroenterology, vol. 13, no. 3, Jan. 2002, pp. 146-53, https://www.turkjgastroenterol.org/index.php/tjg/article/view/1207.