1. Center for Injury Research and Prevention, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
2. Department of Bioengineering, University of Pennsylvania, Philadelphia, PA, USA
3. Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, USA
4. Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, United States
5. Sports Medicine and Performance Center, Children’s Hospital of Philadelphia, Philadelphia, PA, USA