The intestinal immune system: a time for the reaper.
D001646:Bile / Q000276:immunology; D006801:Humans; D007070:Immunoglobulin A / Q000276:immunology; D007422:Intestines / Q000276:immunology*; D008099:Liver / Q000276:immunology; D010581:Peyer's Patches / Q000276:immunology
D007070:Immunoglobulin A