PMC:7095437 / 565-725 JSONTXT

{"project":"LitCovid-PD-CHEBI","denotations":[{"id":"T2","span":{"begin":40,"end":45},"obj":"Chemical"},{"id":"T3","span":{"begin":101,"end":106},"obj":"Chemical"}],"attributes":[{"id":"A2","pred":"chebi_id","subj":"T2","obj":"http://purl.obolibrary.org/obo/CHEBI_24433"},{"id":"A3","pred":"chebi_id","subj":"T3","obj":"http://purl.obolibrary.org/obo/CHEBI_24433"}],"text":"tients were assigned to the early-stage group (onset of symptoms within 4 days) or progressive-stage group (onset of symptoms within 4–7 days) for analysis. CT "}