1 Department of Surgery, Larner College of Medicine, University of Vermont Medical Center, The University of Vermont, Burlington, Vermont; Department of Pediatrics, Larner College of Medicine, University of Vermont Medical Center, The University of Vermont, Burlington, Vermont. Electronic address: christian.pulcini@uvm.edu.
2 The Department of Pediatrics, Children's National Hospital, George Washington University, Washington, District of Columbia.
4 Department of Pediatrics, Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, Georgia; Department of Emergency Medicine, Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, Georgia.
5 Department of Pediatrics, Ann and Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, Illinois.
6 Department of Pediatrics, Children's Hospital of Philadelphia, University of Pennsylvania, Philadelphia, Pennsylvania.
7 Departments of Pediatrics, Harvard Medical School, Boston, Massachusetts; Division of Emergency Medicine, Boston Children's Hospital, Boston, Massachusetts.