PMC:7324763 / 33370-33380 JSONTXT

{"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T693","span":{"begin":0,"end":10},"obj":"GO:0009986"},{"id":"T47723","span":{"begin":0,"end":10},"obj":"GO:0009986"}],"text":"surface of"}