Contreras CA, Ochoa TJ, Ruiz J, Lacher DW, Rivera FP, Saenz Y, Chea-Woo E, Zavaleta N, Gil AI, Lanata CF, Huicho L, Maves RC, Torres C, DebRoy C, Cleary TG. Phylogenetic relationships of Shiga toxin-producing Escherichia coli isolated from Peruvian children. J Med Microbiol. 2011 May; 60(Pt 5):639-646.