1. State Key Laboratory of Proteomics, Beijing Proteome Research Center, Beijing Institute of Radiation Medicine, Beijing 102206, P. R. China, Beijing Cancer Hospital, Beijing 100036, P. R. China, Cancer Institute (Hospital), Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100021, P. R. China, and Institutes of Biomedical Sciences Fudan University, Shanghai 200032, P. R. China