PubMed:32150618 / 1160-1174
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T166","span":{"begin":0,"end":14},"obj":"NNS"}],"text":"concentrations"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok181","span":{"begin":0,"end":14},"obj":"NNS"}],"text":"concentrations"}