PMC:7696151 / 5824-5879
Annnotations
LitCovid-sentences
{"project":"LitCovid-sentences","denotations":[{"id":"T49","span":{"begin":0,"end":55},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"In total, 133 papers were selected for data extraction."}