Genetic Syndromes and Multimorbidity in Adults with Congenital Heart Disease and Heart Failure: Insights from the PATHFINDER-CHD Registry. - Kaemmerer-Suleiman, Ann-Sophie; Mellert, Fritz; Achenbach, Stephan; Bambul-Heck, Pinar; Cesnjevar, Robert; Dewald, Oliver; Dreher, Helena; Eicken, Andreas; Engel, Anna; Ewert, Peter; Freiberger, Annika; Hörer, Jürgen; et al. (Journal of Clinical Medicine, 2026)