1. Division of Neonatology, Department of Pediatrics, Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, IN, USA
2. Division of Neonatology and Pediatric Cardiology, Department of Pediatrics, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
3. Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
4. Department of Epidemiology and Biostatistics, California Preterm Birth Initiative, University of California San Francisco, San Francisco, CA, USA
5. Department of Pediatrics, Texas Tech University Health Sciences Center, Lubbock, TX, USA
6. Division of Neonatology, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, USA
7. Division of Neonatology, Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA
8. Department of Pediatrics, CHOC Children's Hospital, Orange, CA, USA
9. University of California Irvine, Orange, CA, USA
10. Department of Cardiac Surgery, Boston Children's Hospital, Department of Surgery, Harvard Medical School Boston, Boston, MA, USA
11. Division of Cardiac, Thoracic and Vascular Surgery, New York-Presbyterian/Morgan Stanley Children's Hospital, Columbia University Medical Center, Pediatric and Congenital Cardiac Surgery, New York, NY, USA
12. Division of Critical Care Medicine, Department of Pediatrics, Texas Children's Hospital, Baylor College of Medicine, Houston, TX, USA
13. Division of Newborn Medicine, Department of Pediatrics, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
14. Division of Neonatology, Department of Pediatrics, New York-Presbyterian Morgan Stanley Children's Hospital, Columbia University Irving Medical Center, New York, NY, USA