Karlén, J., Mohlkert, L., Gudmundsdottir, A., Eliasson, H., Bonamy, A. E., Halvorsen, C. P. (2026). Cardiac function in 6-year-old children born extremely preterm and associations to prolonged patent ductus arteriosus shunting. Scientific Reports. https://doi.org/10.1038/s41598-025-34302-x