PubMed:32141570 / 945-952
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T143","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"centers"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok154","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"centers"}