Hotez P J, Ghosh K, Hawdon J, Narasimhan S, Jones B, Bethony J
Department of Epidemiology and Public Health, Yale University School of Medicine, New Haven, CT 06520, USA.
Pediatr Infect Dis J. 1997 Oct;16(10):935-40. doi: 10.1097/00006454-199710000-00006.