Evaluation of a Filtering Facepiece Respirator and a Pleated Particulate Respirator in Filtering Ultrafine Particles and Submicron Particles in Welding and Asphalt Plant Work Environments.

Int J Environ Res Public Health · 2021 · PMC8296285 · PMID 34198698

Europe PMC DOI

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a clear trendno p-value reported

However, considering other uncertainties, the results are quite consistent and exhibit a clear trend.

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