1. Department of Pediatrics, University of Chicago Comer Children's Hospital, Chicago, Illinois
2. Department of Pediatrics, NorthShore University HealthSystem Evanston Hospital, Evanston, Illinois
3. Department of Pediatrics, University of Chicago Pritzker School of Medicine, Chicago, Illinois
4. Department of Pediatrics, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
5. Graduate Student Intern, School of Health Studies, Northern Illinois University, DeKalb, Illinois
6. Department of Obstetrics and Gynecology, University of Virginia School of Medicine, Charlottesville, Virginia
7. Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
8. Department of Pediatrics, University of Virginia School of Medicine, Charlottesville, Virginia
9. Department of Pediatrics, Madigan Army Medical Center, Tacoma, Washington