Frequency and risk factors for toxocariasis in children from a pediatric outpatient center in southeastern Brazil - Teixeira, Cristiane Rodrigues; Chieffi, Pedro Paulo; Lescano, Susana Angelica Zevallos; Silva, Elisabete Ourique de Melo; Fux, Blima; Cury, Márcia Cristina (Revista do Instituto de Medicina Tropical de São Paulo, 2006)