1. The MOE Key Laboratory of Cell Proliferation and Differentiation, School of Life Sciences, Center for Life Sciences, Genome Editing Research Center, Peking University , Beijing 100871, China
2. National Institute of Biological Sciences, Zhongguancun Life Science Park , Beijing 102206, China
3. Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University , Beijing 102206, China