PMC:7784787 / 7-109 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T2","span":{"begin":54,"end":62},"obj":"Sentence"},{"id":"T3","span":{"begin":63,"end":67},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"9: mask efficacy is dependent on both fabric and fit\n\nAbstract\nAim: Face masks are an important additi"}