Helicobacter pylori and gastric lymphoma: high seroprevalence of CagA in diffuse large B-cell lymphoma but not in low-grade lymphoma of mucosa-associated lymphoid tissue type. - Delchier JC; Lamarque D; Levy M; Tkoub EM; Copie-Bergman C; Deforges L; Chaumette MT; Haioun C (The American journal of gastroenterology, 2001)