PMC:7795804 / 29297-29307
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T243","span":{"begin":0,"end":9},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Age class\n"}