1. Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R.�China
2. Department of Oncology, The People's Hospital of Guizhou Province, Guiyang, Guizhou 550004, P.R. China
3. Department of Pathophysiology, School of Basic Medicine, Anhui Medical University, Hefei, Anhui 230032, P.R.�China
4. Institute of Biotechnology, University of Helsinki, 00014 Helsinki, Finland
5. Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China