1. Department of International Health, Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe Street (E5535), Baltimore, MD 21205, United States of America (USA).
2. Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, USA.
3. Department of Microbiology, Universidad Peruana Cayetano Heredia, Lima, Peru.
4. Department of Plant and Soil Sciences, University of Delaware, Newark, USA.
5. PRISMA, Lima, Peru.