1. Section of Pediatric Infectious Diseases, Children’s Hospital Colorado, Aurora, Colorado, USA
2. Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado, USA
3. Center for Global Health, Colorado School of Public Health, Aurora, Colorado, USA
4. Center for Human Development, Fundacion para la Salud Integral de los Guatemaltecos, Guatemala City, Guatemala
5. Department of Pediatrics, Hospital Roosevelt, Guatemala City, Guatemala
6. Department of Pathology and Laboratory Medicine, Children’s Hospital Colorado, Aurora, Colorado, USA
7. Department of Infection Control and Epidemiology, Children’s Hospital Colorado, Aurora, Colorado, USA
8. Microbiology Laboratory, Hospital Roosevelt, Guatemala City, Guatemala