1. Cancer Center, Institute of Cancer Stem Cell, Dalian Medical University, Dalian, China
2. State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University, Guangzhou, China
3. Department of Oncology, the Second Affiliated Hospital of Dalian Medical University, Dalian, China
4. Department of Surgery and Cancer, Imperial College London, London W12 0NN, UK
5. Department of Oncology, the First Affiliated Hospital of Dalian Medical University, Dalian, China
6. Department of Pathology, the Second Affiliated Hospital of Dalian Medical University, Dalian, China
7. Department of Life Sciences, Imperial College London, London SW7 2AZ, UK