1. State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
2. Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China
3. Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601 Anhui, China
4. Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing 100101, China