Fig. 1From: Research participation after terrorism: an open cohort study of survivors and parents after the 2011 Utøya attack in NorwayFlow chart of the study participation among survivors of the Utøya shooting (on the left) and survivors with parental participation (on the right). In total, 355 of the 490 (72 %) invited survivors participated in one or both study waves, and 331 of the 482 (69 %) survivors aged <33 years had ≥1 parent(s) who participated in the studyBack to article page