1 Division of Emergency Medicine, Children's National Hospital (AM Stewart), Washington, DC; Department of Pediatrics and Department of Emergency Medicine, George Washington University School of Medicine and Health Sciences (AM Stewart), Washington, DC. Electronic address: Amstewart@childrensnational.org.
2 Office of Government Relations, Boston Children's Hospital (J Greenberg), Boston, Mass.
3 Jumpstart for Young Children (KW Barnes), Boston, Mass.
4 Division of General Pediatrics, Boston Children's Hospital (A Winn), Boston, Mass; Department of Pediatrics, Harvard Medical School (A Winn), Boston, Mass.