1. Division of Neonatology, Department of Pediatrics, Baylor University Medical Center, Dallas, Texas
2. Pediatrix Medical Group, Dallas, Texas
3. The MEDNAX Center for Research, Education, Quality and Safety, Sunrise, Florida
4. Department of Pediatrics, Baylor College of Medicine, San Antonio, Texas
5. Providence Alaska Medical Center, Anchorage, Alaska
6. Greenville Health System, Greenville, South Carolina