1. Infectious Diseases Research Collaboration, Kampala, Uganda
2. Department of Pathology, College of Health Science, Makerere University, Kampala, Uganda
3. College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, Kampala, Uganda
4. Child Health and Development Centre, Makerere University College of Health Sciences, Kampala, Uganda
5. Department of Medicine, University of California, San Francisco, California, USA