PMC:7589163 / 66305-66343 JSONTXT

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{"project":"LitCovid-sentences","denotations":[{"id":"T414","span":{"begin":0,"end":38},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Serum level and supplementation trial."}