1. Imperial College London, London, UKLondon School of Hygiene and Tropical Medicine, London, UK
2. Imperial College London, London, UKAsociación Benéfica Prisma, Lima, Peru
3. Asociación Benéfica Prisma, Lima, PeruUniversidad Peruana Cayetano Heredia, Lima, PeruJohns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
4. Asociación Benéfica Prisma, Lima, Peru
5. Imperial College London, London, UK
6. Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
7. Imperial College London, London, UKLondon School of Hygiene and Tropical Medicine, London, UKAsociación Benéfica Prisma, Lima, PeruUniversidad Peruana Cayetano Heredia, Lima, PeruJohns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA