PMC:7080117 / 9466-9491
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T81","span":{"begin":0,"end":25},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" Unknown exposure 4 (4%)"}