Long-term iron supplementation in four patients with X-linked erythropoietic protoporphyria: associations with serum proteins and erythrocyte protoporphyrin levels—a single-centre retrospective study - Minder, Anna-Elisabeth; Granata, Francesca; van Breemen, Franziska; Schneider-Yin, Xiaoye; Minder, Elisabeth I.; Saleh, Lanja; Barman-Aksözen, Jasmin (Frontiers in Molecular Biosciences, 2025)