PubMed:32052373 / 1089-1097
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T149","span":{"begin":0,"end":8},"obj":"NNS"}],"text":"controls"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok168","span":{"begin":0,"end":8},"obj":"NNS"}],"text":"controls"}