1. Division of Bacterial, Parasitic and Allergenic Products, Center for Biologics Evaluation and Research
2. Department of Pediatrics, Uniformed Services University of the Health Sciences, Bethesda, Maryland
3. Evans Biomedical Research Center, Department of Medicine and Section of Infectious Diseases, Boston University Medical Center, Boston, Massachusetts
4. Division of Infectious Diseases, Children's National Medical Center, Washington, D.C.