PubMed:32149769 / 1960-1961
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T298","span":{"begin":0,"end":1},"obj":"-LRB-"}],"text":"("}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok383","span":{"begin":0,"end":1},"obj":"("}],"text":"("}