1. Mildred Stahlman Division of Neonatology,
2. Departments of Pediatrics and
3. Health Policy, Vanderbilt University, Nashville, Tennessee;
4. Center for Child Health Policy, Vanderbilt University Medical Center, Nashville, Tennessee;
5. Department of Pediatrics, Perelman School of Medicine and
6. Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania; and
7. Division of Neonatology, The Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania