1. Centre for Cardiovascular Sciences; College of Medical and Dental Sciences; University of Birmingham; Birmingham UK
2. Department of Cardiology; Royal Liverpool University Hospital; Liverpool UK
3. Wellcome Trust Clinical Research Facility; Queen Elizabeth Hospital; Edgbaston Birmingham UK
4. Department of Cardiothoracic Surgery; Queen Elizabeth Hospital; University Hospitals Birmingham; Edgbaston Birmingham UK
5. Basil Hetzel Institute, Queen Elizabeth Hospital; University of Adelaide; Adelaide Australia
6. Clinical and Experimental Sciences; Faculty of Medicine; University of Southampton; Southampton UK
7. School of Medicine and Dentistry; University of Aberdeen; Aberdeen UK