PMC:7212965 / 9524-9648 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T62","span":{"begin":0,"end":124},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"For studies from the United States, we continued to monitor major journals for additional publications until April 19, 2020."}