PMC:7529504 / 133-141
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T5","span":{"begin":1,"end":8},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"\nPURPOSE"}