Hagel, I., Cabrera, M., Buvat, E., Gutiérrez, L., Santaella, C., Borges, R., Infante, B., Salas, M.C., Barrios, Y. (2008)Antibody responses and resistance against Ascaris lumbricoides infection among Venezuelan rural children: the influence of ethnicity, J Trop Pediatr. , 54(5), pp. 354-