Non-anemic iron deficiency predicts prolonged hospitalisation following surgical aortic valve replacement: a single-centre retrospective study oleh Matthew C. Frise, David A. Holdsworth, Manraj S. Sandhu, Adrian J. Mellor, Adetayo S. Kasim, Helen C. Hancock, Rebecca H. Maier, Keith L. Dorrington, Peter A. Robbins, Enoch F. Akowuah