PubMed:32081636 / 148-153
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T23","span":{"begin":1,"end":3},"obj":"IN"}],"text":" of s"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok28","span":{"begin":1,"end":3},"obj":"IN"}],"text":" of s"}