1. University of Minnesota, Department of Pediatrics, Minneapolis, Minnesota
2. American Family Children’s Hospital, Department of Child Life Services, Madison, Wisconsin
3. University of Wisconsin, Madison, BerbeeWalsh Department of Emergency Medicine, Madison, Wisconsin; University of Wisconsin, Madison, Department of Radiology, Madison, Wisconsin
4. University of Wisconsin, Madison, Department of Biostatistics and Medical Informatics, Madison, Wisconsin
5. University of Wisconsin, Madison, BerbeeWalsh Department of Emergency Medicine, Madison, Wisconsin; University of Wisconsin, Madison, Department of Pediatrics, Madison, Wisconsin