PMC:7211620 / 645-660
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T10","span":{"begin":0,"end":15},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"1 Introduction"}