PMC:7796291 / 4490-4702 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T28","span":{"begin":18,"end":184},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"as often missing. Additionally, it has hardly been examined for the effect of treatment on the structural integrity of the filter media, which may affect the resistance of respirators. This study aims at divulgin"}