PubMed:32077115 / 1773-1774
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T307","span":{"begin":0,"end":1},"obj":"SYM"}],"text":"\u003c"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok369","span":{"begin":0,"end":1},"obj":"NN"}],"text":"\u003c"}