What Difficulties Do Children and Adolescents Experience in Everyday Activities After a Traumatic Event? Focus Groups and Delphi Survey for the Development of a Questionnaire on PTSD-related Functional Impairment

1\. Focus groups to identify relevant domains of PTSD-related functional impairment in trauma-exposed children and adolescents to ensure content validity. 2. Delphi Questionnaire evaluation of a list of domains of PTSD-related functional impairment in trauma-exposed children and adolescents (previously selected from based on a literature review and focus groups) on a Likert scale of 1 to 5 for their relevance