1. Department of Infectious Diseases, Imperial College School of Medicine, Hammersmith Hospital,1 and
2. Department of Microbiology and Pathology, Universidad Cayetano Heredia,2
3. Instituto National de Ciencias Neurologicas,3 and
4. Department of Applied Pharmacology, Imperial College School of Medicine, National Heart and Lung Institute,4 London, United Kingdom;
5. AB Prisma,6 Lima, Peru;
6. Department of International Health, Johns Hopkins School of Hygiene and Public Health, Baltimore, Maryland5; and
7. Department of Pathology, University of Michigan Medical School, Ann Arbor, Michigan7