1. School of Basic Medical Science, Ningxia Medical University, Yinchuan, China
2. School of Pharmacy, Ningxia Medical University, Yinchuan, China
3. The First People’s Hospital of Yinchuan, Yinchuan, China
4. School of Public Health & Management, Ningxia Medical University, Yinchuan, China
5. Key Laboratory of Health Risk Appraisal for Trace Toxic Chemicals of Zhejiang Province, Ningbo Municipal Center for Disease Control and Prevention, Ningbo, China