Leggat Peter A, Ross Mary H, Dürrheim David N, de Frey Albie, Blumberg Lucille H
School of Public Health and Tropical Medicine, James Cook University, Townsville, Qld 4811, Australia; School of Public Health,University of the Witwatersrand, Johannesburg, South Africa.
Travel Med Infect Dis. 2003 Feb;1(1):17-8. doi: 10.1016/S1477-8939(02)00005-4.