1. Children's Hospital at Montefiore, Bronx, New York
2. Department of Pediatrics, Albert Einstein College of Medicine, Bronx, New York
3. New York-Presbyterian Morgan Stanley Children’s Hospital, New York, New York
4. Columbia University Irving Medical Center, New York, New York
5. Children's National Hospital, Washington, District of Columbia
6. Department of Pediatrics, School of Medicine and Health Sciences, George Washington University, Washington, District of Columbia
7. El Paso Children’s Hospital, El Paso, Texas
8. Texas Tech University Health Sciences Center, El Paso, Texas
9. Seattle Children’s Hospital, Seattle, Washington and
10. Department of Pediatrics, School of Medicine, University of Washington, Seattle, Washington
11. Comer Children’s Hospital, Chicago, Illinois
12. Department of Pediatrics, Pritzker School of Medicine, University of Chicago, Chicago, Illinois