1. School of Public Health Lanzhou University Lanzhou China
2. Henan Institute of Advanced Technology Zhengzhou University Zhengzhou China
3. Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei China
4. The First People's Hospital of Lanzhou City Lanzhou China
5. Key Laboratory of Biological Monitoring and Restoration of Environmental Pollution in Gansu Province Lanzhou China