PubMed:32242348 / 193-204
Annnotations
LitCovid-sentences-v1
{"project":"LitCovid-sentences-v1","denotations":[{"id":"TextSentencer_T2","span":{"begin":0,"end":11},"obj":"Sentence"}],"text":"BACKGROUND:"}
LitCovid-TimeML
{"project":"LitCovid-TimeML","denotations":[{"id":"tok33","span":{"begin":0,"end":10},"obj":"NNP"},{"id":"tok34","span":{"begin":10,"end":11},"obj":":"}],"text":"BACKGROUND:"}