PMC:7245295 / 3750-3905 JSONTXT

{"project":"LitCovid-PD-CHEBI","denotations":[{"id":"T5","span":{"begin":89,"end":94},"obj":"Chemical"}],"attributes":[{"id":"A5","pred":"chebi_id","subj":"T5","obj":"http://purl.obolibrary.org/obo/CHEBI_24433"}],"text":"The study by Tang et al. is also at risk of immortal time bias unless everyone in the AC group initiated therapy on the day of admission, which is unclear."}

{"project":"LitCovid-sentences","denotations":[{"id":"T25","span":{"begin":0,"end":155},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The study by Tang et al. is also at risk of immortal time bias unless everyone in the AC group initiated therapy on the day of admission, which is unclear."}