Çetin KARACA, et al. “Is Lower Socio-Economic Status a Risk Factor for Helicobacter Pylori Infection in Pregnant Women With Hyperemesis Gravidarum?”. Turkish Journal of Gastroenterology, vol. 15, no. 2, July 2019, pp. 86-89, https://tjg.avesjournals.com/index.php/tjg/article/view/1901.