1. Department of Pediatrics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania;
2. Division of Emergency Medicine and Pediatric Sepsis Program, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania;
3. Department of Pediatrics, Feinberg School of Medicine, Northwestern University and Ann and Robert H. Lurie Children’s Hospital of Chicago, Chicago, Illinois;
4. Department of Pediatrics, School of Medicine, University of Colorado, Aurora, Colorado; and
5. Division of Emergency Medicine, Children’s Hospital Colorado, Aurora, Colorado