1. Cancer Hospital and Institute, Peking Union Medical College (PUMC) and Chinese Academy of Medical Sciences (CAMS), Beijing, P. R. China;
2. Zhejiang Cancer Hospital, Hangzhou, Zhejiang, P. R. China;
3. Shanxi Cancer Hospital, Taiyuan, Shanxi, P. R. China;
4. Sun Yat-sen University Cancer Center, Guangzhou, Guangdong, P. R. China;
5. Cancer Hospital, Tianjin Medical University, Tianjin, P. R. China;
6. Fujian Provincial Cancer Hospital, Fuzhou, Fujian, P. R. China;
7. Guizhou Cancer Hospital, Guiyang, Guizhou, P. R. China;
8. Hunan Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Changsha, Hunan, P. R. China;
9. The Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui, P. R. China; and
10. Peking Union Medical College Hospital, CAMS and PUMC, Beijing, P. R. China