1. Department of Statistics and Operations Research, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
2. Department of Genetics, University of North Carolina, Chapel Hill, NC, USA
3. National Center for PTSD: Behavioral Sciences Division at VA Boston Healthcare System, Boston, MA, USA
4. Department of Psychiatry, Boston University School of Medicine, Boston, MA, USA
5. Biomedical Genetics, Boston University School of Medicine, Boston, MA, USA
6. Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
7. School of Nursing, University of North Carolina, Chapel Hill, NC, USA
8. Institute for Environmental Health Solutions, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
9. Department of Pediatrics, School of Medicine, University of North Carolina, Chapel Hill, NC, USA
10. Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
11. Curriculum in Toxicology and Environmental Medicine, University of North Carolina, Chapel Hill, NC, USA
12. Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA
13. Department of Computer Science, University of North Carolina, Chapel Hill, NC, USA