PubMed:32154135 / 2004-2008
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T368","span":{"begin":0,"end":4},"obj":"VB"}],"text":"have"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok409","span":{"begin":0,"end":4},"obj":"VB"}],"text":"have"}