1. Department of Epidemiology and Public Health; University College Cork; Cork Ireland
2. Clinical Effectiveness Unit, Royal College of Surgeons of England; London United Kingdom
3. Integrated Breast Service, Western Sussex Hospitals National Health Service Foundation Trust; Western Sussex United Kingdom
4. Department of General Surgery; James Paget University Hospitals National Health Service Foundation Trust; Norfolk United Kingdom
5. Department of Plastic Surgery; Sheffield Teaching Hospitals National Health Service Foundation Trust; Sheffield United Kingdom
6. Department of Health Services Research; Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine; London United Kingdom