1 Liverpool School of Tropical Medicine, Liverpool, UK; Department of Infectious Disease, Imperial College London, London W12 0NN, UK; Innovation For Health And Development, Laboratory of Research and Development, Universidad Peruana Cayetano Heredia, Lima, Peru; Innovación Por la Salud Y Desarrollo, Asociación Benéfica PRISMA, Lima, Peru.
2 Department of Infectious Disease, Imperial College London, London W12 0NN, UK; Innovation For Health And Development, Laboratory of Research and Development, Universidad Peruana Cayetano Heredia, Lima, Peru; Innovación Por la Salud Y Desarrollo, Asociación Benéfica PRISMA, Lima, Peru. Electronic address: carlton.evans@ifhad.org.