PMC:7546139 / 490-540
Annnotations
LitCovid-PD-CLO
{"project":"LitCovid-PD-CLO","denotations":[{"id":"T2","span":{"begin":37,"end":38},"obj":"http://purl.obolibrary.org/obo/CLO_0001020"}],"text":"tional precautions are required when a procedure c"}