PubMed:32023684 / 447-452
Annnotations
LitCovid-PAS-Enju
{"project":"LitCovid-PAS-Enju","denotations":[{"id":"EnjuParser_T73","span":{"begin":0,"end":5},"obj":"NNS"}],"text":"kinds"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok80","span":{"begin":0,"end":5},"obj":"NNS"}],"text":"kinds"}