1. Department of Pediatrics, Children's Research Institute, Medical College of Wisconsin, Milwaukee, Wisconsin
2. Department of Pediatrics, New York University School of Medicine, New York, New York
3. Hospitalist Division, Children's National Medical Center, Washington, DC
4. Department of Pediatrics, Harvard Medical School, Boston, Massachusetts
5. Department of Medicine, Children's Hospital Boston, Boston, Massachusetts
6. Department of Pediatrics, University of Utah Health Sciences Center, Salt Lake City, Utah
7. Department of Pediatrics, Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania