1. Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania.
2. Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri.
3. Department of Pathology, University of Edinburgh, Edinburgh, Scotland, United Kingdom.
4. Department of Biostatistics and Epidemiology, University of Pennsylvania, Philadelphia, Pennsylvania.
5. Department of Military and Emergency Medicine, Uniformed Services University, Bethesda, Maryland.