1. Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland;
2. Microbiology of the School of Science, Universidad Peruana Cayetano Heredia, Lima, Peru;
3. School of Public Health and Management, Universidad Peruana Cayetano Heredia, Lima, Peru;
4. Departments of Pathology, Universidad Peruana Cayetano Heredia, Lima, Peru;
5. School of Veterinary Medicine, Universidad Nacional Mayor de San Marcos, Lima, Peru;
6. School of Medicine, Tufts University, Boston, Massachusetts