PubMed:32172546 / 1003-1011
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T161","span":{"begin":0,"end":8},"obj":"VBN"}],"text":"observed"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok178","span":{"begin":0,"end":8},"obj":"VBN"},{"id":"event26","span":{"begin":0,"end":8},"obj":"OCCURRENCE"}],"text":"observed"}