1. aJohns Hopkins School of Medicine, Baltimore, Maryland
2. bUniversity of Virginia School of Medicine, Charlottesville, Virginia
3. cArkansas Children’s Hospital, University of Arkansas for Medical Sciences, Little Rock, Arkansas
4. dNationwide Children’s Hospital, The Ohio State University College of Medicine, Columbus, Ohio
5. eSeattle Children’s Hospital, University of Washington School of Medicine, Seattle, Washington
6. fIndiana University School of Medicine, Indianapolis, Indiana
7. gAmerican Board of Pediatrics, Chapel Hill, North Carolina
8. hBoston Children’s Hospital, Harvard Medical School, Boston, Massachusetts