1. Department of Clinical Biochemistry , Worcestershire Acute Hospitals NHS Trust , Worcestershire , United Kingdom of Great Britain and Northern Ireland , Phone: +01905 760843
2. Department of Blood Sciences , The Royal Wolverhampton NHS Trust , Wolverhampton , United Kingdom of Great Britain and Northern Ireland
3. Surgical Wards , The Royal Wolverhampton NHS Trust , Wolverhampton , United Kingdom of Great Britain and Northern Ireland
4. Public Health Policy Evaluation Unit, Imperial College London , Hammersmith, London , United Kingdom of Great Britain and Northern Ireland
5. Information Department , The Royal Wolverhampton NHS Trust , Wolverhampton , United Kingdom of Great Britain and Northern Ireland
6. Research Institute, Healthcare Sciences , Wolverhampton University , Wolverhampton, West Midlands , United Kingdom of Great Britain and Northern Ireland