PMC:7281378 / 43559-43565
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T340","span":{"begin":0,"end":6},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"3.4.4."}