Design principles for enhancing a digital health platform for patients with atrial fibrillation. - Lilja Guðrún Jóhannsdóttir; Helga Ýr Erlingsdóttir; Sigfús Örvar Gizurarson; Kristján Guðmundsson; Herdís Kristjánsdóttir; Björn Jónsson; María Óskarsdóttir; Anna Sigríður Islind (Health Informatics J., 2025)