1. Department of Epidemiology, University of North Carolina at Chapel Hill Gillings School of Global Public Health, Chapel Hill, North Carolina;
2. Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
3. Department of Family Medicine, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, North Carolina;
4. Department of Microbiology and Parasitology, National Autonomous University of Nicaragua, León, Nicaragua;
5. Department of Medicine, Division of Infectious Diseases, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, North Carolina;
6. Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina;