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When the substance exceeds the Permissible Exposure Limits (PELs) set by OSHA 29CFR 1910.1000 or any other state, local or government regulations then a NIOSH certified respirator with organic vapor capabilities may be advisable

Tapes would also wear out quickly and were easily damaged

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Human arylacetamide deacetylase is responsible for deacetylation of rifamycins: rifampicin, rifabutin, and rifapentine

Participants randomized to provide saliva return their samples to the study center, where they are given another sample kit to complete the day before the next study visit