PMC:7558333 / 27418-27441
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T234","span":{"begin":0,"end":23},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Negative PCR 1 28 29"}