PMC:7675688 / 15854-15956 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T129","span":{"begin":0,"end":102},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"This level of controlled evaluation and documentation is difficult to achieve in civilian populations."}