Affiliation: | 1. Florida Birth Defects Registry Florida Department of Health, Division of Disease Control and Health Protection, Bureau of Epidemiology, Environmental Epidemiology Surveillance and Response Section, , Tallahassee;2. Department of Epidemiology and Biostatistics, College of Public Health, University of South Florida, , Tampa, FL;3. Birth Defects Surveillance Program, Department of Community and Family Health, College of Public Health, University of South Florida, , Tampa, FL |