PMC:7589163 / 92842-92902
Annnotations
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T811","span":{"begin":0,"end":1},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"A randomized double-blind placebo-controlled clinical trial."}
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T609","span":{"begin":0,"end":60},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"A randomized double-blind placebo-controlled clinical trial."}