1. Department of Oncology The First Affiliated Hospital of Zhengzhou University Zhengzhou Henan Province China
2. Department of Pathology The Norwegian Radium Hospital Oslo University Hospital University of Oslo Montebello Oslo Norway
3. Department of Pathology Capital Medical University Beijing China
4. Department of Oncology Anyang Tumour Hospital Anyang Henan Province China
5. Department of Surgery Anyang Tumour Hospital Anyang Henan Province China
6. Department of Surgery The Norwegian Radium Hospital Oslo University Hospital University of Oslo Montebello Norway
7. Department of Pathology Institute for Clinical Medicine Faculty of Medicine University of Oslo Oslo Norway