Journal Article
Thjodleifsson, Bjarni, Hulda Asbjörnsdottir, Rúna B Sigurjonsdottir, David Gislason, Isleifur Olafsson, Elizabet Cook, Thorarinn Gíslason, Rain Jogi, and Christer Janson.
"Seroprevalence of Helicobacter pylori and cagA antibodies in Iceland, Estonia and Sweden." Scandinavian Journal of Infectious Diseases 39, no. 8 (2009): 683-689.