Risk Factors for Sporadic Shiga Toxin–producing Escherichia coli Infections in Children, Argentina oleh Marta Rivas, Sergio Sosa-Estani, Josefa Rangel, Maria G. Caletti, Patricia Vallés, Carlos D. Roldán, Laura Balbi, Maria C. Marsano de Mollar, Diego Amoedo, Elizabeth Miliwebsky, Isabel Chinen, Robert M. Hoekstra, Paul S. Mead, Patricia M. Griffin