1. Freeman Hospital; Department of Vascular Surgery; Freeman Road High Heaton Newcastle upon Tyne UK NE7 7DN
2. Royal College of Physicians; 11 St Andrews Place London UK NW1 4LW
3. Royal Free and University College Medical School; Department of Clinical Biochemistry; Royal Free Hospital Campus Pond Street London UK NW3 2QG
4. Yong Loo Lin School of Medicine, National University of Singapore; Department of Cardiac, Thoracic and Vascular Surgery; 5 Lower Kent Ridge Road Singapore Singapore 119074
5. University of Newcastle upon Tyne; Department of Surgery; Framlington Place Newcastle upon Tyne UK NE24HH