1. Departamento de Medicina da Comunidade, Informação e Decisão em Saúde (MEDCIDS)Faculdade de Medicina da Universidade do Porto Oporto Portugal
2. Center for Health Technology and Services Research (CINTESIS)Faculdade de Medicina da Universidade do Porto Oporto Portugal
3. VA Puget Sound Health Care System Seattle Washington
4. Department of Diabetes and EndocrinologyNottingham University Hospitals NHS Trust Nottingham UK
5. Division of Vascular Surgery and Endovascular Therapy, Michael E. DeBakey Department of SurgeryBaylor College of Medicine Houston Texas
6. Department of Vascular SurgeryLeeds Teaching Hospitals NHS Trust Leeds UK
7. Leeds Institute of Cardiovascular and Metabolic MedicineUniversity of Leeds Leeds UK
8. Department of Diabetes and AngiologyMarienkrankenhaus gGmbH Soest Germany
9. Institute for Health Services Research and Health EconomicsHeinrich‐Heine‐University Düsseldorf Düsseldorf Germany
10. Department of Diabetes and EndocrinologyUniversity Hospitals of Derby and Burton NHS Foundation Trust Derby UK