1. Division of Medicine, United States Army Medical Research Institute of Infectious Diseases, Frederick, Maryland;
2. Virology Division, United States Army Medical Research Institute of Infectious Diseases, Frederick, Maryland;
3. Allied Research Society, Barranquilla, Colombia;
4. Biomelab, Barranquilla, Colombia;
5. Universidad el Bosque, Bogota, Colombia;
6. George Washington University, Washington, District of Columbia