1. Arizona Birth Defects Monitoring Program; Phoenix Arizona
2. National Center on Birth Defects and Developmental Disabilities; U.S. Centers for Disease Control and Prevention; Atlanta Georgia
3. Birth Defects Monitoring and Analysis, Minnesota Department of Health; St. Paul Minnesota
4. College of Public Health; University of South Florida; Tampa Florida
5. Department of Biochemistry and Medical Genetics; University of Manitoba; Winnipeg Manitoba Canada