Posttraumatic stress disorder symptoms in adults with congenital heart disease (ACHD) during the COVID-19 pandemic in Norway - T.K. Grimholt; O. Gjesdal; T. Bonsaksen; T. Heir; O. Ekeberg; I. Schou Bredal; L. Skogstad; I.M. Tøllefsen (International Journal of Cardiology Congenital Heart Disease)