1. CAS Center for Excellence in Nanoscience, CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology (NCNST), Beijing 100190, P. R. China
2. Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Institute of High Energy Physics (IHEP), Chinese Academy of Sciences, Beijing 100049, P. R. China
3. Department of Pathology, General Hospital of Chinese People’s Armed Police Forces, Beijing 100039, P. R. China