Key Laboratory of Stem Cell Biology;
Institute of Health Sciences;
Shanghai Institutes for Biological Sciences;
Chinese Academy of Sciences/Shanghai Jiao Tong University School of Medicine;
Shanghai 200025;
China;
Department of Molecular Genetics;
Microbiology and Immunology;
Robert Wood Johnson Medical School- University of Medicine and Dentistry of New Jersey;
Piseataway;
NJ 08854;
USA;