1 Division of Hospital Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
2 Division of Pediatric Medicine, Department of Pediatrics, University of Toronto and The Hospital for Sick Children, Toronto, Ontario, Canada.
3 Division of Hospital Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois.
4 Center for Health Services & Outcomes Research, Institute for Public Health and Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois.