Genetic diversity of heat-labile toxin expressed by enterotoxigenic Escherichia coli strains isolated from humans - Lasaro, M. A.; Rodrigues, J. F.; Mathias-Santos, Camila; Guth, B. E. C.; Balan, Andrea; Sbrogio-Almeida, M. E.; Ferreira, Luís Carlos de Souza (Journal of Bacteriology, 2008)