1. Clinical Futures & Department of Pediatrics, The Children's Hospital of Philadelphia, Pennsylvania, United States
2. Division of Child and Adolescent Health, Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, New York City, New York, United States
3. Department of Research, American Academy of Pediatrics, Itasca, Illinois, United States
4. Department of Biostatistics, Epidemiology & Informatics, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania, United States
5. Northwestern Children's Practice, Chicago, Illinois, United States
6. Building Blocks Pediatrics, Pleasanton, Texas, United States
7. Department of Population and Family Health, Columbia University Irving Medical Center, New York City, New York, United States