Siregar, Gontar Alamsyah, and Lydia Imelda Laksmi. “Risk Factors of Chronic Atrophic Gastritis”. The Indonesian Journal of Gastroenterology, Hepatology, and Digestive Endoscopy, vol. 15, no. 3, Dec. 2014, pp. 152-6, doi:10.24871/1532014152-156.