1. Rutgers Global Health Institute and Department of Biostatistics and Epidemiology, School of Public Health, Rutgers, The State University of New Jersey, New Brunswick, New Jersey, USA
2. Instituto de Biomedicina, Universidad Central del Ecuador, Quito, Ecuador
3. Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, California, USA
4. Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan, USA
5. Fundacion Raiz, Tumbaco, Ecuador