1. Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital; Chinese Academy of Medical Sciences and Peking Union Medical College; No. 17, Panjiayuan Nanli, Chaoyang District Beijing 100021 P. R. China
2. State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100021 P. R. China
3. SurExam Bio-Tech; Guangzhou Technology Innovation Base, Science City; Guangzhou 510000 Guangdong P. R. China
4. Department of Cancer Epidemiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital; Chinese Academy of Medical Sciences and Peking Union Medical College; Beijing 100021 P. R. China
5. Department of Medical Oncology; Huanxing Cancer Hospital; Beijing 100021 P. R. China