PMC:7265874 / 4577-4600
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T40","span":{"begin":0,"end":23},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"bAt the time of writing"}