PMC:7796148 / 21764-21809
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T198","span":{"begin":0,"end":45},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"No differences were observed between regions."}