Interpreting the results of cancer-related tests: two online services which can help

Researchers in industry, government and academia who are concerned with the assessment of risk from potential carcinogens must rely on an experimentally diverse and qualitatively uneven body of knowledge. Studies which can contribute to the evaluation process include reports of human exposure, experiments involving whole animals and in vitro assays in bacteria, cells or tissues. Though they serve as convincing evidence, reports based on the exposure of humans to carcinogens exist for relatively few substances. Therefore, in most cases, the evaluation of human risk from exposure is based on tests in surrogate systems.