Occhialini, A., Marais, A., Urdaci, M., Sierra Ramos, R., Muñoz Calero, N., Covacci, A., & Mégraud, F. (2001). Composition and Gene Expression of the cag Pathogenicity Island in Helicobacter pylori Strains Isolated from Gastric Carcinoma and Gastritis Patients in Costa Rica.

Occhialini, Alessandra, Armelle Marais, María Urdaci, Rafaela Sierra Ramos, Nubia Muñoz Calero, Antonello Covacci, và Francis Mégraud. Composition and Gene Expression of the Cag Pathogenicity Island in Helicobacter Pylori Strains Isolated From Gastric Carcinoma and Gastritis Patients in Costa Rica. 2001.

Occhialini, Alessandra, et al. Composition and Gene Expression of the Cag Pathogenicity Island in Helicobacter Pylori Strains Isolated From Gastric Carcinoma and Gastritis Patients in Costa Rica. 2001.