1. Department of Pediatrics, University of Chicago Comer Children's Hospital, Chicago, Illinois
2. Department of Pediatrics, San Antonio Military Medical Center, San Antonio, Texas
3. Department of Pediatrics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
4. Department of Obstetrics and Gynecology, St. Joseph's/Candler Health System, Savannah, Georgia
5. Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
6. Department of Pediatrics, University of Virginia School of Medicine, Charlottesville, Virginia
7. Department of Pediatrics, University of Michigan, Ann Arbor, Michigan
8. Evanston Hospital, NorthShore University HealthSystem, Evanston, Illinois
9. Pritzker School of Medicine, University of Chicago, Chicago, Illinois