1 Center for Regenerative and Translational Medicine, Guangdong Provincial Academy of Chinese Medical Sciences, the Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510632, China;
2 Division of Biological Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
This study is supported by a grant from the National Basic Research Program (973 Program) (No. 2013CB966900), Guangdong Provincial Key Laboratory of Cancer Immunotherapy and Guangzhou Key Laboratory of Tumor Immunology Research, and the National Natural Science Foundation of China (No. 81473294).