1. Departments of Pediatrics,
2. Health Policy, and
3. Mildred Stahlman Division of Neonatology, Vanderbilt University, Nashville, Tennessee;
4. Vanderbilt Center for Health Services Research, Nashville, Tennessee;
5. Department of Pediatrics, University of Michigan Health System, Ann Arbor, Michigan;
6. Vermont Oxford Network, Burlington, Vermont;
7. Departments of Pediatrics, and
8. Geisel School of Medicine at Dartmouth, Hanover, New Hampshire;
9. Mathematics and Statistics, University of Vermont, Burlington, Vermont;
10. Division of Neonatology, University of Massachusetts Medical School, Worcester, Massachusetts;
11. Neonatal Quality Improvement Collaborative of Massachusetts, Boston, Massachusetts;
12. Department of Neonatology, Beth Israel Deaconess Medical Center, Boston, Massachusetts; and
13. Harvard Medical School, Boston, Massachusetts