PMC:7110798 / 663-683
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T8","span":{"begin":5,"end":13},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" 0.\n\nAbstract\nBackgr"}