1. Department of Environmental and Occupational Health Sciences, School of Public Health and Information Sciences; University of Louisville; 485 E. Gray Street Louisville KY 40209 USA
2. duPont Manual High School; 120 West Lee Street Louisville KY 40208 USA
3. State Key Laboratory of Reproductive Medicine, Institute of Toxicology; Nanjing Medical University; Nanjing China
4. Department of Pathology; Fujian Medical University; Fujian China