1 Ultromics Ltd, 4630 Kingsgate, Cascade Way, Oxford Business Park South, Oxford, OX4 2SU, UK.
2 Richard A. and Susan F. Smith Center for Outcomes Research in Cardiology, Division of Cardiology, Beth Israel Deaconess Medical Center, Boston, MA, USA.
3 Howard University College of Medicine, Washington, DC, USA.
4 Drexel University College of Medicine, Philadelphia, PA, USA.
5 Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA.
6 Richard A. and Susan F. Smith Center for Outcomes Research in Cardiology, Division of Cardiology, Beth Israel Deaconess Medical Center, Boston, MA, USA. jstrom@bidmc.harvard.edu.