PubMed:32105637 / 2016-2018
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T440","span":{"begin":0,"end":2},"obj":"CD"}],"text":"15"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok486","span":{"begin":0,"end":2},"obj":"CD"}],"text":"15"}