1. Department of Cardiothoracic and Vascular Surgery; Aarhus University Hospital Skejby; Aarhus Denmark
2. MR Research Center; Aarhus University Hospital; Aarhus Denmark
3. Institute of Biomedical Engineering; ETH Zurich; Zurich Switzerland
4. Cardiac Unit, Institute of Child Health; University College; London UK
5. Klinik und Poliklinik für Thorax-, Herz- und Gefässchirurgie; University Münster; Germany