1. Division of Neonatology, Rush University Medical Center, Aurora, Illinois
2. Division of Newborn Medicine, Carl R. Darnall Hospital, Fort Hood, Texas
3. Department of Pediatrics, Dell Children's Hospital, Austin, Texas
4. Division of Neonatology, University of Utah, Salt Lake City, Utah
5. Department of Biostatistics, University of Florida, Jacksonville, Florida
6. Division of Newborn Medicine, Boston Children's Hospital, Boston, Massachusetts
7. Department of Pediatrics, University of Rochester Medical Center, Golisano Children's Hospital at Strong, Rochester, New York