PubMed:32105637 / 1050-1052
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T185","span":{"begin":0,"end":2},"obj":"CD"}],"text":"20"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok197","span":{"begin":0,"end":2},"obj":"CD"}],"text":"20"}