PMC:7246879 / 16213-16464 3 Projects
Annnotations
| Id | Subject | Object | Predicate | Lexical cue |
|---|---|---|---|---|
| T149 | 0-210 | Sentence | denotes | The European Standard (EN 149:2001) classifies FFRs into three classes, FFP1, FFP2, and FFP3, with minimum respective filtration efficiencies of 80%, 94%, and 99% of the particles with a dimension up to 0.6 μm. |
| T150 | 211-251 | Sentence | denotes | An FFP2 is comparable to a N95 FFR [20]. |