1. Department of Pediatrics; Mary Ann and J. Milburn Smith Child Health Research Program; Ann & Robert H. Lurie Children's Hospital of Chicago Research Center; Northwestern University Feinberg School of Medicine; Chicago; Illinois
2. Key Laboratory of Chemical Safety and Health; National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention; Beijing; China
3. Laboratory of Disease Genomics and Individualized Medicine; Beijing Institute of Genomics, Chinese Academy of Sciences; Beijing; China
4. Department of Occupational and Environmental Health Sciences; Peking University School of Public Health; Beijing; China