PMC:7571312 / 35060-35172 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T239","span":{"begin":0,"end":112},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Unless otherwise noted, materials were obtained from commercial suppliers and used without further purification."}