1. Channing Laboratory, Brigham and Women's Hospital, Boston, Massachusetts
2. Department of Ambulatory Care and Prevention, Harvard Medical School and Harvard Pilgrim Health Care, Boston, Massachusetts
3. Department of Pediatrics, Boston University School of Medicine, Boston, Massachusetts
4. Divisions of Infectious Diseases
5. Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
6. General Pediatrics, Children's Hospital Boston, Boston, Massachusetts