1. Department of Histopathology; Nottingham University; Nottingham; UK
2. Department of Histopathology and Molecular Pathology; St James's University Hospital; Leeds; UK
3. Department of Histopathology; Leicester University Hospitals NHS Trust; Leicester; UK
4. East Midlands Breast Screening Programme Quality Assurance Reference Centre; Nottingham University Hospitals NHS Trust; Nottingham; UK
5. Department of Histopathology; Derby Hospitals NHS Foundation Trust; Derby; UK
6. Department of Pathology; Kurume University Medical Centre; Kurume; Japan
7. Leeds/Wakefield Breast Screening Service; Leeds; UK
8. Breast Unit; Nottingham University Hospitals NHS Trust; Nottingham; UK