PubMed:32023685 / 304-311
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T50","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"strains"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok57","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"strains"}