PMC:7195088 / 18882-18931 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T96","span":{"begin":19,"end":20},"obj":"http://purl.obolibrary.org/obo/CLO_0001021"}],"text":"scan at 3–7 days; (b) negative RT-PCR at 3–7 days"}