1. King's College London, Department of Biomedical Engineering and Imaging Sciences; St. Thomas' Hospital; London UK
2. Institute for Experimental Medical Research; Oslo University Hospital and University of Oslo; Oslo Norway
3. K. G. Jebsen Cardiac Research Center and Center for Heart Failure Research; University of Oslo; Oslo Norway
4. University of Auckland; Engineering School Block 1, Level 5, 20 Symonds St Auckland 101 New Zealand