1. Obesity & Endocrinology Research, Institute of Ageing and Chronic Disease, University of Liverpool, Clinical Sciences Centre; University Hospital Aintree; Liverpool UK
2. Department of Cardiothoracic Surgery; Liverpool Heart and Chest Hospital; Liverpool UK
3. Biological Physics Group, School of Physics & Astronomy; The University of Manchester; Manchester UK
4. Division of Cardiovascular Sciences; University of Manchester; The Core Technology Facility Manchester UK
5. Department of Cardiology; Aintree University Hospital; NHS Foundation Trust Liverpool UK