1. aNeonatal Research Institute, Sharp Mary Birch Hospital for Women & Newborns, San Diego, California
2. bUniversity of Alabama at Birmingham, Birmingham, Alabama
3. cDepartment of Pediatrics and Obstetrics, University of Ulm, Ulm, Germany
4. dDepartment of Pediatrics and Obstetrics, Loma Linda University, Loma Linda, California
5. eDepartment of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
6. fDepartment of Pediatrics and Obstetrics, University College Cork, Cork, Ireland
7. gWomen and Children’s Services, Providence St Vincent Medical Center, Portland, Oregon
8. hDepartment of Pediatrics and Obstetrics, Sharp Grossmont Hospital, La Mesa, California
9. iDepartment of Pediatrics and Obstetrics, University of Mississippi Medical CenterJackson, Mississippi
10. jDepartment of Pediatrics and Obstetrics, Magee Women’s Hospital of UPMC, Pittsburgh, Pennsylvania
11. kUniversity of Utah, Department of Pediatrics and Obstetrics, Salt Lake City, Utah
12. lDepartment of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, California
13. mDepartment of Pediatrics and Obstetrics, Christiana Care Health System, Newark, Delaware
14. nDepartment of Pediatrics, Saint Louis University School of Medicine, St Louis, Missouri
15. oDepartment of Pediatrics, University of California, Irvine, School of Medicine, Orange, California
16. pDepartment of Pediatrics, John H. Stroger, Jr Hospital of Cook County, Chicago, Illinois
17. qDepartment of Pediatrics and Obstetrics, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio
18. rDepartment of Pediatrics, University of California at San Diego, San Diego, California