1. Nationwide Children’s Hospital and College of Medicine, The Ohio State University, Columbus, Ohio;
2. Pediatric Emergency Medicine, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington;
3. US Public Health Service (Retired);
4. Children’s Hospital of San Antonio, San Antonio, Texas;
5. Baylor College of Medicine, Houston, Texas;
6. Section of Emergency Medicine, Department of Pediatrics, Baylor College of Medicine, Houston, Texas;
7. Phoenix Children's Hospital Medicine, Phoenix Children's Hospital, Phoenix, Arizona;
8. University of Arizona College of Medicine-Phoenix, Phoenix, Arizona; and
9. Doernbecher Children’s Hospital and Oregon Health and Science University, Portland, Oregon