1. Shabbar I. Ranapurwala, Apostolos A. Alexandridis, Rebecca B. Naumann, and Stephen W. Marshall are with the Department of Epidemiology and the Injury Prevention Research Center, University of North Carolina, Chapel Hill. Meghan E. Shanahan is with the Injury Prevention Research Center and the Department of Maternal and Child Health, University of North Carolina, Chapel Hill. Scott K. Proescholdbell is with the Injury and Violence Prevention Branch, North Carolina Division of Public Health, Raleigh, NC....