Carlton Evans*, Hector H. Garcia†‡, Robert H. Gilman‡§, and Jon S. Friedland¶1
Author affiliations: *University of Cambridge Clinical School, Cambridge, United Kingdom; †Instituto de Ciencias Neurologicas, Lima, Peru; ‡Universidad Peruana Cayetano Heredia, Lima, Peru; §Johns Hopkins University School of Hygiene and Public Health, Baltimore, USA; and ¶Royal Postgraduate Medical School, Hammersmith Hospital, London, United Kingdom
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