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Current guidelines that make no distinction among different subsets of the population may not be the most effective use of efforts to control death from tobacco-related diseases like lung cancer, Holford said, noting that additional studies are needed to determine whether a sufficient number of African Americans are screened under current guidelines or if changes to current policy are necessary
The European true HEPA equivalent which is increasingly marketed in North America as medical grade is designated H13, and its requirements are virtually identical: 99.95% single-pass capture of the most penetrating particle size (or MPPS)
Retrieved 27 January 2018
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