1. State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
2. Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing 100101, China.
3. Beijing Institute for Stem Cell and Regenerative Medicine, Beijing 100101, China.
4. Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, China.
5. Department of Tissue and Embryology, Hubei Provincial Key Laboratory of Developmentally Originated Disease, School of Basic Medical Sciences, Wuhan University, Wuhan, Hubei Province, China.
6. Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.