1. Divisions of Hematology/Oncology, and
2. Neonatology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, Utah;
3. Primary Children’s Hospital, Salt Lake City, Utah;
4. Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, Utah;
5. Statistical Data Center, LDS Hospital, Salt Lake City, Utah; and
6. Division of Neonatal Medicine, Children’s Hospital and Harvard Medical School, Boston, Massachusetts