PMC:7104236 / 5014-5047
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T40","span":{"begin":0,"end":33},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"2.3 Data extraction and analyses"}