1. National Center for PTSD, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA
2. Department of Psychiatry and Child and Adolescent Psychiatry, New York University, Langone Medical Center, New York, NY, USA
3. University College London, UK
4. School of Psychology, University of New South Wales, Sydney, New South Wales, Australia
5. Department of Psychopathology and Clinical Intervention, University of Zurich, Switzerland