1. Shanghai Stem Cell Institute, Institute of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China
2. Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences, CAS/Shanghai Jiao Tong University School of Medicine, Shanghai, China
3. Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, China
4. Ben May Department for Cancer Research, University of Chicago, Chicago, IL, USA