1. Clinical Effectiveness Unit Royal College of Surgeons of England London UK
2. Hull York Medical School Hull UK
3. University of Sheffield Sheffield UK
4. Department of Vascular Surgery Cambridge University Hospitals NHS Trust and Department of Surgery University of Cambridge Cambridge UK
5. Staffordshire & South Cheshire Vascular Network Royal Stoke University Hospital Stoke‐on‐Trent UK
6. Department of Health Services Research and Policy London School of Hygiene and Tropical Medicine London UK