PubMed:31996494 / 52-57
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T7","span":{"begin":0,"end":1},"obj":"-LRB-"}],"text":"(2019"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok10","span":{"begin":0,"end":1},"obj":"("},{"id":"tok11","span":{"begin":1,"end":5},"obj":"CD"},{"id":"lookup2","span":{"begin":1,"end":5},"obj":"year"}],"text":"(2019"}