JAFARZADEH, Abdollah, Jafar AHMEDI-KAHANALI, Mehdi BAHRAMI, and Zahra TAGHIPOUR. 2007. “Seroprevalence of Anti-Helicobacter Pylori and Anti-CagA Antibodies Among Healthy Children According to Age, Sex, ABO Blood Groups and Rh Status in South-East of Iran”. Turkish Journal of Gastroenterology 18 (3):165-71. https://www.turkjgastroenterol.org/index.php/tjg/article/view/1593.