PubMed:32141570 / 563-572
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T78","span":{"begin":0,"end":9},"obj":"NNS"}],"text":"MATERIALS"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok86","span":{"begin":0,"end":9},"obj":"NNP"}],"text":"MATERIALS"}