title: ESTSS and ISTSS: "heterozygous twins".
abstract: The development of traumatic stress studies during the past decades has much profited from professionals from the United States and from Europe. However, these professional societies, the International Society for Traumatic Stress Studies and the European Society for Traumatic Stress Studies (ESTSS) still struggle to find an equal common pathway. This is a personal retrospective view of Berthold Gersons, past president of ESTSS on behalf of the 20th anniversary of ESTSS.
authors.affiliation: Academic Medical Center, University of Amsterdam, Arq Psychotrauma Expert Group, Diemen, The Netherlands.
authors.forename: Berthold P R
authors.initials: BP
authors.lastname: Gersons
keywords: ESTSS; ISTSS; PTSD