PMC:7019868 / 24493-24676 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T171","span":{"begin":0,"end":183},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Previous studies using reverse genetics on other coronaviruses have identified many virulent/attenuating determinants that might be shared among different genus of coronaviruses [12]."}

{"project":"2_test","denotations":[{"id":"31905842-31689903-144353234","span":{"begin":179,"end":181},"obj":"31689903"}],"text":"Previous studies using reverse genetics on other coronaviruses have identified many virulent/attenuating determinants that might be shared among different genus of coronaviruses [12]."}