1. Infectious Diseases Department, Hospital de Infectología, “La Raza” National Medical Center, IMSS, Mexico City, Mexico
2. Epidemiology Department, Hospital de Infectología, “La Raza” National Medical Center, IMSS, Mexico City, Mexico
3. Pediatric Infectious Diseases Department, “Siglo XXI” National Medical Center, IMSS, Mexico City, Mexico
4. Central Blood Bank, “La Raza” National Medical Center, IMSS, Mexico City, Mexico
5. Internal Medicine Department, St. Johannisstift Ev. Krankenhaus Paderborn, Germany