PMC:7212949 / 55451-55504 JSONTXT

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    LitCovid-PMC-OGER-BB

    {"project":"LitCovid-PMC-OGER-BB","denotations":[{"id":"T1373","span":{"begin":43,"end":53},"obj":"SP_7"}],"text":"Tsai et al (2005)N = 664, probableRetrospective study"}