1. Department of Public Health Sciences, University of California, Davis, California, USA
2. Institute of Hygiene and Environmental Medicine, University of Giessen, Germany
3. Laboratory of Genetic Ecotoxicology, Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, and Health Institute of Central Bohemia, Prague, Czech Republic
4. Department of Statistics and
5. Department of Rheumatology, Allergy, and Clinical Immunology, University of California, Davis, California, USA
6. Department of Epidemiology and Biostatistics, University of California, San Francisco, California, USA
7. Department of Pediatrics, and
8. Center for Health and the Environment, University of California, Davis, California, USA