PubMed:33012350 / 2067-2115 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T18","span":{"begin":0,"end":48},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"We did not include gray literature or preprints."}