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Background Epidemiologic studies have raised the possibility that some pesticide compounds induce the neurodegenerative disease amyotrophic lateral sclerosis (ALS), though the available evidence is not entirely consistent. Methods We conducted a population-based case-control study in two Italian populations to assess the extent to which residence in the vicinity of agricultural crops associated...
Beryllium is classified as carcinogenic on the basis largely of limited human data showing a modest increase in lung cancer from occupational exposure. With occupational exposure now curtailed, earlier results merit more scrutiny. We simulated data to understand the design implications of a landmark case-control study.We generated datasets from the original occupational cohort by randomly assigning...
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