PubMed:32134681 / 2479-2489
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T497","span":{"begin":0,"end":10},"obj":"NN"}],"text":"retraction"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok593","span":{"begin":0,"end":10},"obj":"NN"}],"text":"retraction"}