1. Department of Medical Genetics and Developmental Biology, School of Basic Medical Science, Capital Medical University, Beijing Key Laboratory of Cancer Invasion & Metastasis Research, Beijing, China
2. School of Nursing, Dalian Medical University, Dalian, China
3. Institute for Laboratory Animal Resources, National Institutes for Food and Drug Control, Beijing, China
4. Department of Epidemiology and Biostatistics, School of Public Health, Capital Medical University, Beijing, China
5. Laboratory Animal Center, Chinese Center for Disease Control and Prevention, Beijing, China