PubMed:32209890 / 133-144
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":"tok25","span":{"begin":0,"end":10},"obj":"NNP"},{"id":"tok26","span":{"begin":10,"end":11},"obj":":"}],"text":"BACKGROUND:"}