PMC:7795888 / 6883-6907 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T40","span":{"begin":0,"end":2},"obj":"Sentence"},{"id":"T41","span":{"begin":3,"end":24},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"2. Materials and Methods"}