PMC:7386785 / 5291-5542 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T46","span":{"begin":96,"end":232},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":" this should be interpreted in the context of selection bias and heterogeneity between studies. Based on currently available data, neither absence nor presence of signs or symptoms are accurate enough to rule in or rule out disease. Prospective studie"}