PMC:7143846 / 21008-21036
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T165","span":{"begin":0,"end":28},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"missing data 13,709 (76.74)"}