This study, sponsored by the National Institutes of Health and the EPA, is being conducted to investigate the effects of environmental, occupational, dietary and genetic factors on pesticide applicators and their spouses. It began in 1994 and involves over 89,000 subjects. Documents, fact sheets, and more are available on the Agricultural Health Study web wite, which is linked from the Public Health Library’s Toxicology/Occupational Health Resources page at: