PubMed:32096367 / 1359-1366
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T198","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"strains"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok220","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"strains"}