1. School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
2. Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
3. Instituto de Microbiologia, Universidad San Francisco de Quito, Quito, Ecuador
4. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia, USA
5. Centro de Biomedicina, Universidad Central del Ecuador, Quito, Ecuador