PMC:7436876 / 2300-2347 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T20","span":{"begin":0,"end":47},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"MFHM and KA contributed equally to this letter."}