1. The University of Texas School of Public Health, San Antonio Regional Campus, San Antonio, Texas, USA
2. Department of Urology, and
3. The University of Pretoria Centre for Sustainable Malaria Control, University of Pretoria, Pretoria, South Africa
4. Social and Scientific Systems Inc., Durham, North Carolina, USA
5. Cellular and Molecular Pathology Branch, and
6. Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, USA