1. Institute of Toxicology, College of Preventive Medicine, Third Military Medical University, Chongqing, China
2. Chongqing Institute of Science and Technology for Population and Family Planning, Chongqing, China
3. Centre for Chronobiology, Institute for Medical Psychology, University of Munich, Munich, Germany
4. Department of Environmental Health, College of Preventive Medicine, Third Military Medical University, Chongqing, China