1. University of Edinburgh; Centre for Population Health Sciences; Edinburgh UK EH8 9AG
2. Frimley Park Hospital NHS Foundation Trust; Surrey UK GU16 7UJ
3. National University Health System; Department of Cardiac, Thoracic and Vascular Surgery; 5 Lower Kent Ridge Road Singapore Singapore 119074
4. Royal Free Hospital Campus, University College London Medical School; Department of Clinical Biochemistry; University College London (UCL) Pond Street London UK NW3 2QG
5. Freeman Hospital; Northern Vascular Centre; Newcastle upon Tyne UK NE7 7DN