PMC:7780429 / 7574-7700 JSONTXT

{"project":"LitCovid-sentences","denotations":[{"id":"T46","span":{"begin":0,"end":126},"obj":"Sentence"}],"namespaces":[{"prefix":"_base","uri":"http://pubannotation.org/ontology/tao.owl#"}],"text":"The questionnaire was written after an analysis of the literature and a thorough reflection on the problem to be investigated."}