Clinical, endoscopic and prognostic aspects of primary gastric non-Hodgkin's lymphoma associated with acquired immunodeficiency syndrome - Rezende, Rosamar Eulira Fontes; Mantelmacher, Marcos; Ferreira, Sandro da Costa; Hyppólito, Elodie Bomfim; Machado, Alcyone Artioli; Ardengh, José Celso; Modena, José Luiz Pimenta (Brazilian Journal of Infectious Diseases, 2009)