PMC:7781502 / 9272-9407 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T106","span":{"begin":0,"end":135},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"These results have to be taken with caution because preprints were indexed in PubMed with delay resulting from the publication process."}