PMC:7212949 / 8663-8724 JSONTXT

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    LitCovid-PMC-OGER-BB

    {"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T549","span":{"begin":14,"end":22},"obj":"SP_9"},{"id":"T550","span":{"begin":43,"end":54},"obj":"PR:000012546"}],"text":"Guan et al (2020)N = 1099, confirmed casesRetrospective study"}