1. Department of General Surgery Stepping Hill Hospital Stockport UK
2. Department of General Surgery Royal Bolton Hospital Bolton UK
3. Department of General Surgery University Hospital of Heraklion University of Crete Heraklion Greece
4. Liverpool Vascular and Endovascular Service Royal Liverpool University Hospital Liverpool UK
5. School of Physical Sciences University of Liverpool Liverpool UK
6. Department of Vascular and Endovascular Surgery The Royal Oldham Hospital Pennine Acute Hospitals NHS Trust Manchester UK
7. Honorary Senior Lecturer Division of Cardiovascular Sciences School of Medical Sciences University of Manchester Manchester UK