Ruth A. Lanius is Associate Professor, Harris-Woodman Chair, the University of Western Ontario, Canada. Eric Vermetten, MD, PhD, was trained as a psychiatrist and psychotherapist in the Netherlands and finished his residency at Yale University where he worked in a postdoctoral role before moving to Emory University. In 2001, he was employed by the Dutch Army and in 2007 became Officer (ranked COL) in the Dutch Military. He is Head of Research in the Military Mental Health Service with the Department of Defense. He also holds the position of Associate Professor of Psychiatry in the Neuroscience Division of the University Medical Center, Utrecht. In his research, he looks at the biological basis of trauma-related disorders and strategies for early prevention. He is interested in mind-body connections and has published widely on PTSD, dissociation, hypnosis and narrative psychotherapy. He has published over 100 papers on these topics. After serving as President of the Dutch Society of Hypnosis (2000–2006), he served as President of the International Society of Hypnosis (2006–2009), and is now on the Board of the International Society of Traumatic Stress (ISTSS). Among his most recent books are Traumatic Dissociation (with Martin Dorahy and David Spiegel), published by the American Psychiatric Press in 2007, and Neurendocrinology of PTSD, (with Ron de Kloet and Melly Oitzl), published in the series Progress in Brain Research in 2008. Dr Vermetten is an ad hoc reviewer for numerous journals and granting agencies. He has lectured on PTSD across the globe, and in 2012 edited a Dutch textbook on the subject. Clare Pain is Assistant Professor, Department of Psychiatry, University of Toronto, Canada.