PMC:7166029 / 3609-3622
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T39","span":{"begin":0,"end":13},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"2.1 Subjects"}