1. Department of Epidemiology, School of Public Health, Rutgers, The State University of New Jersey, Piscataway2School of Criminal Justice, Rutgers University, Newark, New Jersey3Department of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia
2. Department of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia4Department of Mathematics, School of Science, Hampton University, Hampton, Virginia
3. Department of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia
4. Department of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia5The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
5. Medical Examiner's Office, Philadelphia Department of Public Health, Philadelphia, Pennsylvania