1. Department of Pediatrics, University of Miami Miller School of Medicine and Holtz Children’s Hospital at University of Miami/Jackson Memorial Medical Center, Miami, Florida;
2. Department of Psychiatry and Human Behavior, University of Mississippi School of Medicine, Jackson, Mississippi;
3. Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia;
4. Department of Pediatrics, Children’s National Medical Center, Washington, District of Columbia;
5. Department of Pediatrics, Howard University College of Medicine, Washington, District of Columbia;
6. Department of Pediatrics, The Johns Hopkins University School of Medicine, Baltimore, Maryland;
7. Department of Pediatrics, The Children’s Mercy Hospitals and Clinics, Kansas City, Missouri;
8. Department of Pediatrics, Mt Sinai School of Medicine, New York, New York;
9. Clinical Trials and Surveys Corporation, Owings Mills, Maryland; and
10. Department of Hematology, St Jude Children’s Research Hospital, Memphis, Tennessee