PMC:7335494 / 23289-23316 JSONTXT

{"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T816","span":{"begin":16,"end":18},"obj":"CHEBI:67079;CHEBI:67079"},{"id":"T818","span":{"begin":25,"end":26},"obj":"GO:0007259"}],"text":"Randomized cross-over trial"}