PMC:7796052 / 13097-13121 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T83","span":{"begin":0,"end":2},"obj":"Sentence"},{"id":"T84","span":{"begin":3,"end":24},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"3. Materials and Methods"}