1. National Heart and Lung Institute, Imperial College London, London, UK
2. Department of Cardiology, Imperial College Healthcare NHS Trust, London, UK
3. Department of Physics, Imperial College London, London, UK
4. Centre for Complexity Science, Imperial College London, London, UK
5. Department of Mathematics, Imperial College London, London, UK
6. Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
7. Department of Cardiology, Chelsea and Westminster NHS Foundation Trust, London, UK