PMC:7102659 / 10762-10834
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T89","span":{"begin":0,"end":72},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"We fill the missing data before that from several retrospective studies."}