Type IV secretion of Helicobacter pylori CagA into oral epithelial cells is prevented by the absence of CEACAM receptor expression oleh Nicole Tegtmeyer, Tabita Denisia Ghete, Verena Schmitt, Torsten Remmerbach, Maria Celeste C. Cortes, Edgardo M. Bondoc, Hans-Ludwig Graf, Bernhard B. Singer, Christian Hirsch, Steffen Backert