PMC:7281378 / 9052-9177 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T61","span":{"begin":0,"end":125},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Occasionally, the full-text articles were also requested from the authors, if the full-text article was not available online."}