1. Perinatal Research Center, Nashville, Tennessee, , North Atlantic Neuro-epidemiology Alliances, Institute for Public Health, University of Aarhus, Denmark
2. Department of Medicine and Center for Human Genetics Research, Vanderbilt University, Nashville, Tennessee
3. Perinatal Research Center, Nashville, Tennessee, Department of Obstetrics and Gynecology and Reproductive Science, Yale University, New Haven, Connecticut