PMC:7212965 / 14370-14558 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T105","span":{"begin":0,"end":188},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"To assess the robustness of our results, we performed sensitivity analyses by limiting the included studies to those that clearly reported the presence of symptoms at initial presentation."}