PMC:7210464 / 445-650 JSONTXT

{"project":"LitCovid-PD-CLO","denotations":[{"id":"T1","span":{"begin":3,"end":15},"obj":"http://purl.obolibrary.org/obo/OBI_0000968"},{"id":"T2","span":{"begin":172,"end":177},"obj":"http://purl.obolibrary.org/obo/NCBITaxon_10239"}],"text":"as instrumental variables for causal inference. Stringent quarantines, city lockdowns, and local public health measures imposed in late January significantly decreased the virus transmission rate. The viru"}

{"project":"LitCovid-sentences","denotations":[{"id":"T6","span":{"begin":48,"end":196},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"as instrumental variables for causal inference. Stringent quarantines, city lockdowns, and local public health measures imposed in late January significantly decreased the virus transmission rate. The viru"}