PubMed:32052466 / 56-62
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T8","span":{"begin":0,"end":1},"obj":"DT"}],"text":"A syst"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok9","span":{"begin":0,"end":1},"obj":"DT"}],"text":"A syst"}