1. Molecular Epigenetics Laboratory, Guangzhou Institutes of Biomedicine and Health, Guangzhou 510530, China
2. South China Institute for Stem Cell Biology and Regenerative Medicine, Guangzhou Institutes of Biomedicine and Health, Guangzhou 510530, China
3. National Institute of Child Health and Human Development, Section on Cell Cycle Regulation, NIH, Bethesda, MD 20892
4. Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20852