1 Office of the Clinical Director, National Institute of Mental Health, Bethesda, MD, United States of America.
2 Department of Psychiatry, Boston University School of Medicine & National Center for PTSD and VA Boston Healthcare System, Boston, MA, United States of America.
3 John Peter Smith Health Network, Fort Worth, TX, United States of America.
4 Office of the Clinical Director, National Institute of Mental Health, Bethesda, MD, United States of America. Electronic address: horowitzl@mail.nih.gov.
5 The Abigail Wexner Research Institute at Nationwide Children's Hospital and The Ohio State University College of Medicine, Columbus, OH, United States of America.