PubMed:32171193 / 155-163
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T22","span":{"begin":0,"end":8},"obj":"VBZ"}],"text":"involves"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok29","span":{"begin":0,"end":8},"obj":"VBZ"}],"text":"involves"}