PMC:7294857 / 23000-23116 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T193","span":{"begin":0,"end":116},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"Several factors cause the progression of the disease from mild symptoms to severe and poor prognosis of the disease."}