Functional and immunological characterization ofa natural polymorphic variantofa heat-labile toxin(LT-I)produced by enterotoxigenicEscherichia coli (ETEC) - Lasaro, Melissa A.; Mathias-Santos, Camila; Rodrigues, Juliana Falcão; Ferreira, Luís Carlos de Souza (Fems Immunology and Medical Microbiology, 2009)