1. GlaxoSmithKline Vaccines CARICAM, Panama City, Republic of Panama;
2. Sistema Nacional de Investigación, SNI-Senacyt, Panama City, Republic of Panama;
3. Hospital de Niños José Renán Esquivel, Panama City, Republic of Panama;
4. Caja del Seguro Social, Panama City, Republic of Panama;
5. Hospital Irma De Lourdes Tzanetato, Panama City, Republic of Panama;
6. Hospital Santo Tomás, Panama City, Republic of Panama;
7. Hospital Oncológico, Panama City, Republic of Panama;
8. Instituto Conmemorativo Gorgas, Panama City, Republic of Panama;
9. Hospital Infantil de México, Federico Gómez, Mexico DF, Mexico;
10. Department of Microbiology, Immunology, and Pathology, Colorado State University, Fort Collins, Colorado;
11. Department of Medicine, Section of Infectious Diseases, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma;
12. Department of Medicine, Division of Infectious Diseases, University of Colorado, Anschutz Medical Campus, Aurora, Colorado;
13. Facultad de Ciencias Exactas, Universidad de Panama, Panama City, Republic of Panama;
14. Facultad de Ciencias de la salud, Uisek, Ecuador