For this report, the quality, reliability and relevance of data on both exposure and effects were assessed for their possible contribution to a risk assessment of NMP. The assessment scores indicated that the available data are of only very limited use for assessing the risk of NMP to human health. Several shortcomings were identified, the most important of which was the heterogeneity of the methods used, including use of “bespoke” methods for analysing data obtained by environmental monitoring and inconsistencies in observations of adverse effects. Assessment of the quality of the studies should promote best practices in experimental design to be used in future studies. It is generally recommended that standard methods be developed and adopted to ensure that the research community can reduce uncertainties, strengthen overall scientific understanding and provide more robust data for assessing the risks of exposure to NMP to humans.

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