1. Gangarosa Department of Environmental Health, Emory University Rollins School of Public Health, Atlanta, Georgia, USA
2. Veterinary Faculty, Universidade Eduardo Mondlane, Maputo, Mozambique
3. Biotechnology Centre, Universidade Eduardo Mondlane, Maputo, Mozambique
4. Department of Environmental and Occupational Health Sciences, University of Washington School of Public Health, Seattle, Washington, USA
5. Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Neston, UK
6. International Livestock Research Institute, Nairobi, Kenya
7. Hubert Department of Global Health, Emory University Rollins School of Public Health, Atlanta, Georgia, USA