PubMed:32150360 / 3746-3752
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T636","span":{"begin":0,"end":6},"obj":"NNS"}],"text":"issues"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok699","span":{"begin":0,"end":6},"obj":"NNS"}],"text":"issues"}