1. Division of Birth Defects and Developmental Disabilities; Centers for Disease Control and Prevention; Atlanta GA USA
2. Harvard University School of Public Health; Boston MA USA
3. University of California; San Francisco CA USA
4. University of Southern California; Los Angeles CA USA
5. Washington State University; Spokane WA USA
6. Office of New Drugs; Center for Drug Evaluation and Research, US Food and Drug Administration; Silver Spring MD USA
7. University of British Columbia; Vancouver British Columbia Canada
8. Slone Epidemiology Center; Boston University; Boston MA USA