PubMed:32077659 / 122-124
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T17","span":{"begin":0,"end":2},"obj":"TO"}],"text":"To"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok19","span":{"begin":0,"end":2},"obj":"TO"}],"text":"To"}