1. Division of Hospital Medicine, Children’s Hospital Los Angeles, Los Angeles, California;
2. Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, California;
3. Division of Hospital Medicine and
4. Pediatrics and
5. College of Medicine, University of Cincinnati, Cincinnati, Ohio
6. Division of Epidemiology, Departments of Environmental and Public Health Sciences and
7. James M. Anderson Center for Health Systems Excellence, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio; and