1. Cellular Pathology Southmead Hospital, North Bristol NHS Trust Bristol UK
2. Department of Histopathology Nuffield Orthopaedic Centre Oxford UK
3. Department of Pathology, Faculty of Medicine in Plzen Charles University Plzen Czech Republic
4. Biomedical Center, Faculty of Medicine in Plzen Charles University Plzen Czech Republic
5. Bioptical Laboratory, Ltd. Plzen Czech Republic
6. Department of Surgical and Molecular Pathology National Institute of Oncology Budapest Hungary