1. Biophotonics Research Group, Cranfield Health, Gloucestershire Hospitals NHS Foundation Trust, Gloucester, UK
2. Biophotonics Research Group, Gloucestershire Hospitals NHS Foundation Trust, Great Western Road, Gloucester, GL1 3NN, UK
3. Gastrointestinal Surgical Unit, Gloucestershire Hospitals NHS Foundation Trust, Gloucester, UK
4. Department of Pathology, Gloucestershire Hospitals NHS Foundation Trust, Gloucester, UK
5. Department of Materials and Medical Sciences, Cranfield University, Shrivenham, UK