1 Center for Pediatric Trauma Research and Center for Injury Research and Policy, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA; The Ohio State University, College of Public Health, Columbus, OH, USA.
2 Center for Pediatric Trauma Research and Center for Injury Research and Policy, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA; The Ohio State University, College of Public Health, Columbus, OH, USA; The Ohio State University, College of Medicine, Columbus, OH, USA. Electronic address: Huiyun.Xiang@Nationwidechildrens.org.