1. Department of Public Health Sciences, University of California Davis School of Medicine, Davis, California, USA
2. Medical Investigation of Neurodevelopmental Disorders (MIND) Institute, University of California, Davis, Sacramento, California, USA
3. Division of Biostatistics, Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
4. Department of Pediatrics, University of California Davis School of Medicine, Davis, California, USA
5. Department of Psychiatry and Behavioral Sciences, University of California Davis School of Medicine, Davis, California, USA
6. Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, West Virginia, USA