PubMed:32052466 / 121-128
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T19","span":{"begin":1,"end":3},"obj":"CC"}],"text":" or 201"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok22","span":{"begin":1,"end":3},"obj":"CC"}],"text":" or 201"}