1. Center for Child and Adolescent Health Policy, Massachusetts General Hospital, Boston, MA
2. Center for Child Health Care Studies, Department of Ambulatory Care and Prevention, Harvard Pilgrim Health Care and Harvard Medical School
3. Division of General Pediatrics, Children's Hospital Boston
4. Department of Health Policy and Management, Johns Hopkins Bloomberg School of Public Health
5. Department of Pediatrics, Harvard Medical School
6. Department of Pediatrics and Infectious Diseases Unit, Massachusetts General Hospital
7. Harvard Vanguard Medical Associates