Methylation at SLC6A4 Is Linked to Family History of Child Abuse: An Examination of the Iowa Adoptee Sample Steven R.H. Beach,* Gene H. Brody, Alexandre A. Todorov, Tracy D. Gunter, and Robert A. Philibert University of Georgia, Athens, GA Department of Psychiatry, Washington University, St. Louis, MO Department of Neurology and Psychiatry, St. Louis University School of Medicine, St. Louis, MO...