1. Duke Translational Medicine Institute, Duke University, Durham, NC 27710, USA.
2. Duke Institute for Genome Sciences and Policy, Duke University, Durham, NC 27708, USA.
3. Duke University School of Law, Durham, NC, 27708, USA.
4. Developmental Epidemiology Program, Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC 27710, USA.