PMC:7335494 / 23885-23912 JSONTXT

{"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T2015","span":{"begin":4,"end":9},"obj":"CHEBI:24043;CHEBI:24043"},{"id":"T2016","span":{"begin":11,"end":15},"obj":"GO:0007631"}],"text":"Randomized controlled trial"}