1. School of Medicine University of Central Lancashire Preston United Kingdom
2. School of Medicine, Faculty of Health Sciences University of Cape Town Cape Town South Africa
3. School of Medicine University of Liverpool Liverpool United Kingdom
4. Department of Cardiothoracic Surgery Liverpool Heart and Chest Hospital Liverpool United Kingdom
5. Department of Cardiac Surgery Alder Hey Children Hospital Liverpool United Kingdom
6. Liverpool Centre of Cardiovascular Science Liverpool Heart and Chest Hospital Liverpool United Kingdom