PMC:7091888 / 31052-31115 JSONTXT

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{"project":"LitCovid-sentences","denotations":[{"id":"T183","span":{"begin":0,"end":63},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Two-tailed Student’s t test was used. ∗∗∗ represents P \u003c 0.001."}