1 Janessa M. Graves is with the College of Nursing, Washington State University, and the Harborview Injury Prevention and Research Center (HIPRC), Spokane, WA. I. Barry Pless is with McGill University, and the Injury Prevention Program, Montreal Children's Hospital, Montreal, Québec. Frederick P. Rivara is with Seattle Children's Hospital and the University of Washington, Seattle. Frederick P. Rivara is also with HIPRC.