PubMed:32061066 / 1954-1961
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T387","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"patents"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok443","span":{"begin":0,"end":7},"obj":"NNS"}],"text":"patents"}