PMC:7317273 / 13345-13350
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T225","span":{"begin":0,"end":5},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Older"}