1. Jingzhen Yang is with the Center for Injury Research and Policy, The Research Institute at Nationwide Children’s Hospital, and Department of Pediatrics, College of Medicine and Department of Epidemiology, College of Public Health, The Ohio State University, Columbus. R. Dawn Comstock is with the Department of Epidemiology, The Colorado School of Public Health, and the Department of Pediatrics, Emergency Medicine, School of Medicine, University of Colorado Anschutz, Aurora. Honggang Yi is with the Center...