1. Division of Birth Defects Research, Department of Pediatrics; College of Medicine, University of Arkansas for Medical Sciences; Little Rock Arkansas
2. Division of Genetic Medicine, Department of Pediatrics; University of Washington; Seattle Washington
3. Stanford University School of Medicine; Stanford California
4. Dell Pediatric Research Institute, Department of Nutritional Sciences; The University of Texas at Austin; Austin Texas
5. Department of Epidemiology; MD Anderson Cancer Center; Houston Texas
6. Department of Epidemiology and Biostatistics; University of California San Francisco; San Francisco California
7. Department of Biostatistics; College of Medicine, University of Arkansas for Medical Sciences; Little Rock Arkansas