PubMed:32134681 / 2000-2001
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T375","span":{"begin":0,"end":1},"obj":"-LRB-"}],"text":"("}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok447","span":{"begin":0,"end":1},"obj":"("}],"text":"("}