PMC:7210464 / 36634-36654
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T301","span":{"begin":0,"end":20},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"OLS IV OLS IV OLS IV"}