PMC:7510993 / 6561-6676 JSONTXT

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    LitCovid-PD-CLO

    {"project":"LitCovid-PD-CLO","denotations":[{"id":"T30","span":{"begin":32,"end":44},"obj":"http://purl.obolibrary.org/obo/OBI_0000245"}],"text":" published by the World Tourism Organization (https://www.e-unwto.org/toc/unwtotfb/current). We then calculated the"}